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Twitter is without a doubt the best way to share and discover what is happening right now.

Biblio brings together thousands of independent booksellers worldwide to offer you over 50 million used, rare, out-of-print, signed and first edition books and textbooks. Searching is done by author, title, keyword, or isbn number. Search Biblio for ...

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.

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Stock photography community providing high quality stock photos and stock images. Free photos added weekly.

Prezi is the zooming presentation editor

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

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Frank Borst, is an artist from the city of Leiden (The Netherlands). During his career Frank has been gradually expressing his vision about many of the social issues (like wars) that afflict our world. Frank work, simply aims to increase the collecti...