LIBRARY OF CONGRESS CYAC SUBJECT HEADINGS
TENTATIVE MONTHLY LIST 07 CYAC (July 2026)


The proposed headings on this list are NOT YET APPROVED and not yet available for use in current cataloging.
Send all comments on this list to the CYAC Program - Email: cyacprog@loc.gov
"(A)" indicates pre-approved proposals for material in Priority 1. "(C)" indicates proposals submitted by libraries in the Subject Authority Cooperative Program (SACO).

 
 
CHILDREN'S SUBJECT HEADINGS
 
150
Anatomy    [Not Subd Geog]    [sp2021057089]
 
360
SA subdivision Anatomy under individual animals and groups of animals and individual organs and regions of the body, e.g. Fishes--Anatomy; Cattle--Anatomy; Foot--Anatomy DELETE FIELD
 
550
RT Physiology DELETE FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
680
Here are entered works on anatomy in general as well as works specifically on animal anatomy. DELETE FIELD
 
680
Here are entered works on anatomy in general as well as works specifically on animal anatomy. Assign an additional heading for the type of animal, organ, and/or region of the body, if appropriate. ADD FIELD
 
 
150
Back    [Not Subd Geog]    [sp2021054175]
 
053
QM540 (Anatomy) DELETE FIELD
 
450
UF Backs ADD FIELD
 
450
UF Dorsa ADD FIELD
 
550
BT Physiology DELETE FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Bill (Anatomy) CHANGE HEADING
 
150
Beak    [Not Subd Geog]    [sp2021054235]
 
450
UF Beaks (Anatomy)
 
450
UF Bill (Anatomy) [Former heading]
 
550
BT Anatomy
 
688
Heading changed from Bill (Anatomy) to Beak in July 2026.
 
 
150
Body fluids    [Not Subd Geog]    [sp2021056631]
 
053
QP90.5 DELETE FIELD
 
053
QP90.5 (Physiology) ADD FIELD
 
360
SA subdivision Secretions under individual organs and regions of the body, e.g. Heart--Secretions DELETE FIELD
 
450
UF Animal fluids and humors DELETE FIELD
 
450
UF Body humors DELETE FIELD
 
450
UF Fluids, Body DELETE FIELD
 
450
UF Fluids and humors, Animal DELETE FIELD
 
450
UF Humors, Body DELETE FIELD
 
450
UF Biofluids ADD FIELD
 
450
UF Biological fluids ADD FIELD
 
450
UF Body fluid ADD FIELD
 
450
UF Bodily fluids ADD FIELD
 
550
BT Physiology ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Water in the body CHANGE HEADING
 
150
Body water    [Not Subd Geog]    [sp2021058033]
 
450
UF Water in the body [Former heading]
 
550
BT Body fluids
 
688
Heading changed from Water in the body to Body water in July 2026.
 
 
150
Buttocks    [Not Subd Geog]    [sp2021053519]
 
053
QL950.39 (Animal and comparative anatomy) DELETE FIELD
 
053
QL950.39 (Zoology) ADD FIELD
 
450
UF Butt ADD FIELD
 
450
UF Butts ADD FIELD
 
450
UF Buttock ADD FIELD
 
550
BT Back DELETE FIELD
 
550
BT Anatomy ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Chest    [Not Subd Geog]    [sp2022050019]
 
450
UF Thorax, Human DELETE FIELD
 
450
UF Chests (Anatomy) ADD FIELD
 
450
UF Thoraces ADD FIELD
 
450
UF Thorax ADD FIELD
 
450
UF Thoraxes ADD FIELD
 
 
150
Breast CHANGE HEADING
 
150
Breasts    [Not Subd Geog]    [sp2021052189]
 
450
UF Breast [Former heading]
 
550
BT Chest
 
688
Heading changed from Breast to Breasts in July 2026.
 
 
150
Claws    [Not Subd Geog]    [sp2021056091]
 
053
QL942 DELETE FIELD
 
450
UF Talons ADD FIELD
 
550
BT Paws ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Cooking, Japanese CHANGE HEADING
 
150
Japanese cooking    [May Subd Geog] CHANGE GEOG    [sp2021054834]
 
450
UF Cooking, Japanese [Former heading]
 
450
UF Cuisine, Japanese
 
450
UF Japanese cuisine
 
550
BT Cooking
 
688
Heading changed from Cooking, Japanese to Japanese cooking in July 2026.
 
 
150
Cooking, Korean CHANGE HEADING
 
150
Korean cooking    [May Subd Geog] CHANGE GEOG    [sp2021054995]
 
450
UF Cooking, Korean [Former heading]
 
450
UF Cuisine, Korean
 
450
UF Korean cuisine
 
550
BT Cooking
 
688
Heading changed from Cooking, Korean to Korean cooking in July 2026.
 
 
150
Cooking, Lebanese CHANGE HEADING
 
150
Lebanese cooking    [May Subd Geog] CHANGE GEOG    [sp2021052951]
 
450
UF Cooking, Lebanese [Former heading]
 
450
UF Cuisine, Lebanese
 
450
UF Lebanese cuisine
 
550
BT Cooking
 
688
Heading changed from Cooking, Lebanese to Lebanese cooking in July 2026.
 
 
150
Cooking, Mediterranean CHANGE HEADING
 
150
Mediterranean cooking    [May Subd Geog] CHANGE GEOG    [sp2021056213]
 
450
UF Cooking, Mediterranean [Former heading]
 
450
UF Cuisine, Mediterranean
 
450
UF Mediterranean cuisine
 
550
BT Cooking
 
688
Heading changed from Cooking, Mediterranean to Mediterranean cooking in July 2026.
 
 
150
Cooking, Mexican CHANGE HEADING
 
150
Mexican cooking    [May Subd Geog] CHANGE GEOG    [sp2021052903]
 
450
UF Cooking, Mexican [Former heading]
 
450
UF Cuisine, Mexican
 
450
UF Mexican cuisine
 
550
BT Cooking
 
688
Heading changed from Cooking, Mexican to Mexican cooking in July 2026.
 
 
150
Cooking, Middle Eastern CHANGE HEADING
 
150
Middle Eastern cooking    [May Subd Geog] CHANGE GEOG    [sp2021056426]
 
450
UF Cooking, Middle Eastern [Former heading]
 
450
UF Cuisine, Middle Eastern
 
450
UF Middle Eastern cuisine
 
550
BT Cooking
 
688
Heading changed from Cooking, Middle Eastern to Middle Eastern cooking in July 2026.
 
 
150
Cooking, Moroccan CHANGE HEADING
 
150
Moroccan cooking    [May Subd Geog] CHANGE GEOG    [sp2021056190]
 
450
UF Cooking, Moroccan [Former heading]
 
450
UF Cuisine, Moroccan
 
450
UF Moroccan cuisine
 
550
BT Cooking
 
688
Heading changed from Cooking, Moroccan to Moroccan cooking in July 2026.
 
 
150
Cooking, New Zealand CHANGE HEADING
 
150
New Zealand cooking    [May Subd Geog] CHANGE GEOG    [sp2021057453]
 
450
UF Cooking, New Zealand [Former heading]
 
450
UF Cuisine, New Zealand
 
450
UF New Zealand cuisine
 
550
BT Cooking
 
688
Heading changed from Cooking, New Zealand to New Zealand cooking in July 2026.
 
 
150
Cooking, North African CHANGE HEADING
 
150
North African cooking    [May Subd Geog] CHANGE GEOG    [sp2021059636]
 
450
UF Cooking, North African [Former heading]
 
450
UF Cuisine, North African
 
450
UF North African cuisine
 
550
BT Cooking
 
688
Heading changed from Cooking, North African to North African cooking in July 2026.
 
 
150
Cooking, Norwegian CHANGE HEADING
 
150
Norwegian cooking    [May Subd Geog] CHANGE GEOG    [sp2021055728]
 
450
UF Cooking, Norwegian [Former heading]
 
450
UF Cuisine, Norwegian
 
450
UF Norwegian cuisine
 
550
BT Cooking
 
688
Heading changed from Cooking, Norwegian to Norwewgian cooking in July 2026.
 
 
150
Cooking, Pakistani CHANGE HEADING
 
150
Pakistani cooking    [May Subd Geog] CHANGE GEOG    [sp2021061473]
 
450
UF Cooking, Pakistani [Former heading]
 
450
UF Cuisine, Pakistani
 
450
UF Pakistani cuisine
 
550
BT Cooking
 
688
Heading changed from Cooking, Pakistani to Pakistani cooking in July 2026.
 
 
150
Cooking, Polish CHANGE HEADING
 
150
Polish cooking    [May Subd Geog] CHANGE GEOG    [sp2021057396]
 
450
UF Cooking, Polish [Former heading]
 
450
UF Cuisine, Polish
 
450
UF Polish cuisine
 
550
BT Cooking
 
688
Heading changed from Cooking, Polish to Polish cooking in July 2026.
 
 
150
Cooking, Roman CHANGE HEADING
 
150
Roman cooking    [May Subd Geog] CHANGE GEOG    [sp2021055210]
 
450
UF Cooking, Roman [Former heading]
 
450
UF Cuisine, Roman
 
450
UF Roman cuisine
 
550
BT Cooking
 
688
Heading changed from Cooking, Roman to Roman cooking in July 2026.
 
 
150
Cooking, Russian CHANGE HEADING
 
150
Russian cooking    [May Subd Geog] CHANGE GEOG    [sp2021053824]
 
450
UF Cooking, Russian [Former heading]
 
450
UF Cuisine, Russian
 
450
UF Russian cuisine
 
550
BT Cooking
 
688
Heading changed from Cooking, Russian to Russian cooking in July 2026.
 
 
150
Cooking, Scandinavian CHANGE HEADING
 
150
Scandinavian cooking    [May Subd Geog] CHANGE GEOG    [sp2021055729]
 
450
UF Cooking, Scandinavian [Former heading]
 
450
UF Cuisine, Scandinavian
 
450
UF Scandinavian cuisine
 
550
BT Cooking
 
688
Heading changed from Cooking, Scandinavian to Scandinavian cooking in July 2026.
 
 
150
Cooking, Southeast Asian CHANGE HEADING
 
150
Southeast Asian cooking    [May Subd Geog] CHANGE GEOG    [sp2021055846]
 
450
UF Cooking, Southeast Asian [Former heading]
 
450
UF Cuisine, Southeast Asian
 
450
UF Southeast Asian cuisine
 
550
BT Cooking
 
688
Heading changed from Cooking, Southeast Asian to Southeast Asian cooking in July 2026.
 
 
150
Cooking, Spanish CHANGE HEADING
 
150
Spanish cooking    [May Subd Geog] CHANGE GEOG    [sp2021053321]
 
450
UF Cooking, Spanish [Former heading]
 
450
UF Cuisine, Spanish
 
450
UF Spanish cuisine
 
550
BT Cooking
 
688
Heading changed from Cooking, Spanish to Spanish cooking in July 2026.
 
 
150
Cooking, Swiss CHANGE HEADING
 
150
Swiss cooking    [May Subd Geog] CHANGE GEOG    [sp2021057095]
 
450
UF Cooking, Swiss [Former heading]
 
450
UF Cuisine, Swiss
 
450
UF Swiss cuisine
 
550
BT Cooking
 
688
Heading changed from Cooking, Swiss to Swiss cooking in July 2026.
 
 
150
Cooking, Thai CHANGE HEADING
 
150
Thai cooking    [May Subd Geog] CHANGE GEOG    [sp2021059218]
 
450
UF Cooking, Thai [Former heading]
 
450
UF Cuisine, Thai
 
450
UF Thai cuisine
 
550
BT Cooking
 
 
150
Cooking, Vietnamese CHANGE HEADING
 
150
Vietnamese cooking    [May Subd Geog] CHANGE GEOG    [sp2021054561]
 
450
UF Cooking, Vietnamese [Former heading]
 
450
UF Cuisine, Vietnamese
 
450
UF Vietnamese cuisine
 
550
BT Cooking
 
688
Heading changed from Cooking, Vietnamese to Vietnamese cooking in July 2026.
 
 
150
Cooking, West African CHANGE HEADING
 
150
West African cooking    [May Subd Geog] CHANGE GEOG    [sp2021056026]
 
450
UF Cooking, West African [Former heading]
 
450
UF Cuisine, West African
 
450
UF West African cuisine
 
550
BT Cooking
 
688
Heading changed from Cooking, West African to West African cooking in July 2026.
 
 
150
Face    [Not Subd Geog]    [sp2021051033]
 
053
NC770 (Drawing) DELETE FIELD
 
053
QL950.5 (Comparative anatomy) DELETE FIELD
 
053
QM535 (Human anatomy) DELETE FIELD
 
053
RL87 (Dermatology) DELETE FIELD
 
053
QM695.F32 (Human anatomy) ADD FIELD
 
053
QP327 (Physiology) ADD FIELD
 
053
RC73.4 (Internal medicine) ADD FIELD
 
053
RC280.F32 (Neoplasms) ADD FIELD
 
053
RD661.5 (Surgery) ADD FIELD
 
450
UF Human face DELETE FIELD
 
450
UF Faces ADD FIELD
 
550
RT Pathognomy DELETE FIELD
 
550
RT Physiognomy DELETE FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Beards CHANGE HEADING
 
150
Beard    [Not Subd Geog]    [sp2021054321]
 
053
GT2320 (Manners and customs (General))
 
450
UF Beards [Former heading]
 
550
BT Face
 
550
BT Hair
 
688
Heading changed from Beards to Beard in July 2026.
 
 
150
Eyebrows    [Not Subd Geog]    [sp2021061450]
 
450
UF Eyebrow ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Mustaches CHANGE HEADING
 
150
Mustache    [Not Subd Geog]    [sp2021053042]
 
053
GT2318 (Manners and customs (General))
 
450
UF Moustache
 
450
UF Moustaches
 
450
UF Mustaches [Former heading]
 
550
BT Face
 
550
BT Hair
 
688
Heading changed from Mustaches to Mustache in July 2026.
 
 
150
Great gray owls    [May Subd Geog]    [sp2021059112]
 
450
UF Clouded owls ADD FIELD
 
450
UF Common barn owls ADD FIELD
 
450
UF Gray owls ADD FIELD
 
450
UF Grey owls ADD FIELD
 
450
UF Lapland owls ADD FIELD
 
450
UF Lapp owls ADD FIELD
 
550
BT Owls DELETE FIELD
 
550
BT Earless owls ADD FIELD
 
550
BT Forest birds ADD FIELD
 
680
When this heading is assigned, the second subject heading Owls is also assigned: 1. Great gray owls. 2. Owls. DELETE FIELD
 
680
When this heading is assigned, the second subject heading Earless owls is also assigned: 1. Great gray owls. 2. Earless owls. ADD FIELD
 
 
150
Hawaiian cooking    [May Subd Geog] CHANGE GEOG    [sp2021052075]
 
053
TX724.5.H3 DELETE FIELD
 
450
UF Cookery, Hawaiian [Former heading] DELETE FIELD
 
450
UF Hawaiian cookery [Former heading] DELETE FIELD
 
450
UF Cuisine, Hawaiian ADD FIELD
 
450
UF Hawaiian cuisine ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Head    [Not Subd Geog]    [sp2021054575]
 
053
NC770-NC773 (Anatomy, Artistic) DELETE FIELD
 
053
QM535 (Anatomy, Human) DELETE FIELD
 
053
QM535 (Human anatomy) ADD FIELD
 
450
UF Heads ADD FIELD
 
550
BT Figure drawing DELETE FIELD
 
550
RT Skull DELETE FIELD
 
550
BT Anatomy ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Hoofs CHANGE HEADING
 
150
Hooves    [Not Subd Geog]    [sp2021058278]
 
053
QL942 (Zoology)
 
450
UF Hoof
 
450
UF Hoofs [Former heading]
 
550
BT Feet
 
550
BT Nails (Anatomy)
 
688
Heading changed from Hoofs to Hooves in June 2026.
 
 
150
Imps    [May Subd Geog]    [sp2026050368]
 
450
UF Imp
 
550
BT Demons
 
550
BT Fairies
 
 
150
Iranian cooking    [May Subd Geog]    [sp2026050371]
 
450
UF Cooking, Iranian
 
450
UF Cooking, Persian
 
450
UF Cuisine, Iranian
 
450
UF Cuisine, Persian
 
450
UF Iranian cuisine
 
450
UF Persian cooking
 
450
UF Persian cuisine
 
550
BT Cooking
 
 
150
Lips    [Not Subd Geog]    [sp2021059820]
 
053
QL857 (Comparative anatomy) DELETE FIELD
 
053
QM306 (Human anatomy) DELETE FIELD
 
450
UF Lip ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Long-eared owls    [May Subd Geog]    [sp2021056014]
 
450
UF Cat owls ADD FIELD
 
450
UF Lesser horned owls ADD FIELD
 
450
UF Northern long-eared owls ADD FIELD
 
450
UF Wilson's owls ADD FIELD
 
550
BT Owls DELETE FIELD
 
550
BT Eared owls ADD FIELD
 
680
When this heading is assigned, the second subject heading Owls is also assigned: 1. Long-eared owls. 2. Owls. DELETE FIELD
 
680
When this heading is assigned, the second subject heading Eared owls is also assigned: 1. Long-eared owls. 2. Eared owls. ADD FIELD
 
 
150
Mexican songs    [May Subd Geog]    [sp2026050367]
 
450
UF Mexican song
 
450
UF Song, Mexican
 
450
UF Songs, Mexican
 
550
BT Songs
 
680
Here are entered works on songs of Mexican origin or Mexican authorship.
 
 
150
Neck    [Not Subd Geog]    [sp2021059153]
 
053
QL950.4 (Comparative anatomy) DELETE FIELD
 
053
QM535 (Human anatomy, QM155) DELETE FIELD
 
053
QL950.4 (Zoology) ADD FIELD
 
053
QM535 (Human anatomy) ADD FIELD
 
450
UF Necks ADD FIELD
 
550
BT Anatomy ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Throat    [Not Subd Geog]    [sp2021056695]
 
053
QL950.4 (Comparative anatomy) DELETE FIELD
 
053
QM535 (Human anatomy) DELETE FIELD
 
450
UF Pharynx ADD FIELD
 
450
UF Throats ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Organs (Anatomy)    [Not Subd Geog]    [sp2021058288]
 
450
UF Organ (Anatomy) ADD FIELD
 
550
RT Tissues DELETE FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Phrenology    [May Subd Geog]    [sp2021059307]
 
053
RZ501 (Phrenology and medicine) DELETE FIELD
 
053
RZ501 (Other systems of medicine) ADD FIELD
 
550
BT Brain DELETE FIELD
 
550
BT Head DELETE FIELD
 
550
RT Skull ADD FIELD
 
 
150
Sense organs    [Not Subd Geog]    [sp2021054009]
 
053
GN201 (Somatology) DELETE FIELD
 
053
QL945-QL949 (Comparative anatomy) DELETE FIELD
 
053
GN201 (Anthropology) ADD FIELD
 
053
QL945-QL949 (Zoology) ADD FIELD
 
360
SA subdivision Sense organs under individual animals and groups of animals, e.g. Fishes--Sense organs DELETE FIELD
 
450
UF Sense organ ADD FIELD
 
450
UF Sensory system ADD FIELD
 
550
RT Senses and sensation ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Ear CHANGE HEADING
 
150
Ears    [Not Subd Geog]    [sp2021050515]
 
053
QL948 (Zoology)
 
053
QM507 (Human anatomy)
 
450
UF Ear [Former heading]
 
550
BT Head
 
550
BT Sense organs
 
550
RT Hearing
 
688
Heading changed from Ear to Ears in July 2026.
 
 
150
Equilibrium (Physiology) CHANGE HEADING
 
150
Balance (Physiology)    [May Subd Geog] CHANGE GEOG    [sp2021053743]
 
053
QP471 (Physiology)
 
450
UF Equilibrium (Physiology) [Former heading]
 
550
BT Senses and sensation
 
688
Heading changed from Equilibrium (Physiology) to Balance (Physiology) in June 2026.
 
 
150
Echolocation (Physiology) CHANGE HEADING
 
150
Echolocation    [May Subd Geog] CHANGE GEOG    [sp2021057931]
 
450
UF Echolocation (Physiology) [Former heading]
 
550
BT Animal communication
 
550
BT Hearing
 
550
BT Physiology
 
550
BT Sonar
 
688
Heading changed from Echolocation (Physiology) to Echolocation in July 2026.
 
 
150
Eye CHANGE HEADING
 
150
Eyes    [Not Subd Geog]    [sp2021052991]
 
053
QL949 (Zoology)
 
053
QM511 (Human anatomy)
 
450
UF Eyeballs
 
450
UF Eye [Former heading]
 
550
BT Face
 
550
BT Sense organs
 
550
RT Vision
 
688
Heading changed from Eye to Eyes in July 2026.
 
 
150
Nose    [Not Subd Geog]    [sp2021050506]
 
450
UF Rhinology DELETE FIELD
 
450
UF Noses ADD FIELD
 
450
UF Snout ADD FIELD
 
550
BT Face DELETE FIELD
 
550
BT Respiratory system ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Tongue    [Not Subd Geog]    [sp2021054369]
 
053
QL946 (Comparative anatomy) DELETE FIELD
 
053
QL946 (Zoology) ADD FIELD
 
450
UF Tongues ADD FIELD
 
550
BT Sense organs ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Service industries workers    [May Subd Geog]    [sp2026050372]
 
053
HD8039.S45-.S542 (Industries)
 
450
UF Service industries--Employees
 
450
UF Service industries worker
 
450
UF Service industry workers
 
450
UF Service workers
 
550
BT Employees
 
 
150
Bank employees    [May Subd Geog]    [sp2026050373]
 
450
UF Bank employee
 
450
UF Banks and banking--Employees
 
550
BT Service industries workers
 
 
150
Bank tellers    [May Subd Geog] CHANGE GEOG    [sp2021053001]
 
053
HG1615.7.T4 DELETE FIELD
 
053
HG1615.7.T4 (Finance) ADD FIELD
 
450
UF Bank clerks ADD FIELD
 
450
UF Bank teller ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Building service employees    [May Subd Geog]    [sp2026050374]
 
053
HD8039.B895-.B896 (Industries)
 
450
UF Building employees
 
450
UF Building service employee
 
550
BT Service industries workers
 
 
150
Food service employees    [May Subd Geog]    [sp2026050375]
 
053
HD8039.F7-.F72 (Industries)
 
450
UF Food service--Employees
 
450
UF Food service workers
 
550
BT Service industries workers
 
 
150
Gravediggers    [May Subd Geog] CHANGE GEOG    [sp2021061014]
 
450
UF Gravedigger ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Laundry workers    [May Subd Geog]    [sp2026050376]
 
053
HD8039.L3-.L32 (Industries)
 
450
UF Launderers (Laundry workers)
 
450
UF Laundry worker
 
550
BT Service industries workers
 
 
150
Shoe shiners    [May Subd Geog] CHANGE GEOG    [sp2021056192]
 
053
HD8039.S515 DELETE FIELD
 
053
HD8039.S515-.S5252 (Industries) ADD FIELD
 
450
UF Shoeshiner ADD FIELD
 
450
UF Shoeshiners ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD
 
 
150
Spotted owls    [May Subd Geog]    [sp2021055216]
 
550
BT Owls DELETE FIELD
 
550
BT Earless owls ADD FIELD
 
550
BT Forest birds ADD FIELD
 
550
BT Nocturnal animals ADD FIELD
 
680
When this heading is assigned, the second subject heading Owls is also assigned: 1. Spotted owls. 2. Owls. DELETE FIELD
 
680
When this heading is assigned, the second subject heading Earless owls is also assigned: 1. Spotted owls. 2. Earless owls. ADD FIELD
 
681
Example under Northern spotted owls ADD FIELD
 
 
150
Whiskers    [Not Subd Geog]    [sp2021058753]
 
053
QL942 DELETE FIELD
 
053
QL942 (Zoology) ADD FIELD
 
450
UF Sinus hairs DELETE FIELD
 
450
UF Tactile hairs DELETE FIELD
 
450
UF Whisker ADD FIELD
 
667
Machine-derived authority record. DELETE FIELD