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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.

Docstoc is a community for people to find and share professional documents. Find free legal documents and free business documents.

Providing researchers with access to millions of scientific documents from journals, books, series, protocols and reference works.

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Scribd is a social publishing site, where tens of millions of people share original writings and documents. Scribd

Academia.edu helps academics follow the latest research.

An academic directory and search engine

The Internet

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 ...