books.google.com - Includes Part 1A, Number 1: Books (January - June) and Part 1B, Number 1: Pamphlets, Serials and Contributions to Periodicals (January - June)...http://books.google.com/books/about/Catalog_of_Copyright_Entries_Third_Serie.html?id=whYhAQAAIAAJ&utm_source=gb-gplus-shareCatalog of Copyright Entries. Third Series
