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University of California's Calisphere - Calisphere is the University of California's free public gateway to a world of primary sources. More than 150,000 digitized items — including photographs, documents, newspaper pages, political cartoons, works of art, diaries, transcribed oral histories, advertising, and other unique cultural artifacts — reveal the diverse history and culture of California and its role in national and world history. Calisphere's content has been selected from the libraries and museums of the UC campuses, and from a variety of cultural heritage organizations across California.Calisphere is a public service project of the California Digital Library (CDL).

California State Library - The California State Library, a California public research institution, provides accurate, up-to-date information. Whether you are an elected official, a state employee, a representative of one of California’s libraries, a person with special reading needs, or a member of the general public, the California State Library is here for you. The staff includes librarians, researchers, and consultants.

The Library of Congress - The Library of Congress is the nation's oldest federal cultural institution and serves as the research arm of Congress. It is also the largest library in the world, with millions of books, recordings, photographs, maps and manuscripts in its collections. The Library's mission is to make its resources available and useful to the Congress and the American people and to sustain and preserve a universal collection of knowledge and creativity for future generations.

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