Catalogue of Title-entries of Books and Other Articles Entered in the Office of the Librarian of Congress, at Washington, Under the Copyright Law ... Wherein the Copyright Has Been Completed by the Deposit of Two Copies in the Office Library of Congress. Copyright Office Published: 1927 Total Pages: 1498 Get eBook
Catalog of Copyright Entries. Part 1. [B] Group 2. Pamphlets, Etc. New Series Library of Congress. Copyright Office Published: 1927 Total Pages: 910 Get eBook
Official Gazette of the United States Patent Office United States. Patent Office Published: 1928 Total Pages: 1066 Get eBook
