[Classweb-users] HA1700s

[Sevim McCutcheon]

We have in our collections several volumes of the census of India.  Those that are classified have the call number HA1728. It's not possible to look this up in Classification Web, because the HA schedule jumps from HA1641-1648 (Romania) to HA2280 (Azores)

We thought at first that using HA1700s might have been a local practice, but other library's bibs in OCLC WorldCat have call numbers in the HA1711-HA1728 range as well.

So were these call numbers once valid, but are no longer?
I understand that parentheses are used in Classification Web to indicate that a call numbers is no longer assigned.  Is there a particular reason why this range would be omitted rather than included within parentheses?

Thank you,

Ms. Sevim McCutcheon
Monographs Cataloger 
Kent State University
Libraries and Media Services
P.O. Box 5190
Kent, Ohio 44242-0001
Tel:  330-672-1703
Fax: 330-672-4811
Lmccutch at kent.edu