The published volumes by which the Copyright Office made available copyright registration and renewal information, went through a succession of different names. This page indicates what were the titles.
Generally, the first word of the titles were Catalogue and Catalog,
with this dividing line as to spelling:
• Catalogue of Copyright Entries until 1946
• Catalog of Copyright Entries from 1947
These are the full titles matched to when the particular titles were in use:
* although the 1946 volumes carry the same "Series" name as did those of the previous forty years, other numbering suggests that it was intended that the 1946 volumes be the beginning of the third series.