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These printed reference or subject-specific books and periodicals may be used at the Library of Congress or may be found through other libraries. In some cases, primarily for materials published before 1927, links are provided to the full-text online versions of the books, which are out of copyright. See the Search Tips section of this guide for methods of finding additional books and locating books at other libraries.
The following titles link to fuller bibliographic information in the Library of Congress Online Catalog. Links to additional online content are included when available.