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Internet Archive is a non-profit digital library offering free universal access to books, movies & music, as well as 150 billion archived web pages.

Facebook is a social utility that connects people with friends and others who work, study and live around them. People use Facebook to keep up with friends, upload an unlimited number of photos, post links and videos, and learn more about the people ...

Academia.edu helps academics follow the latest research.

Create your own educational games, quizzes, surveys, and web pages. Search millions of games and quizzes created by educators around the world.

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Diigo is a powerful research tool and a knowledge-sharing community

AbeBooks is your source for Used, New, Rare and Out of print books. Find classic collectibles, rare signed editions, used textbooks, and inexpensive bestsellers from independent booksellers worldwide.

EBSCOhost (ebscohost.com) serves thousands of libraries and other institutions with premium content in every subject area. Free LISTA: LibraryResearch.com