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Find what you want in a library near you with WorldCat, a global catalog of library collections.

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

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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 ...

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Business networking for professionals on XING! Connect to business partners and find jobs, colleagues and employees. Start networking!

Quizlet is a lightning fast way to memorize vocabulary lists. It

Scientific Literature Digital Library incorporating autonomous citation indexing, awareness and tracking, citation context, related document retrieval, similar document identification, citation graph analysis, and query-sensitive document summaries. ...

personal and professional web site for Gerry Stahl, professor of information science at Drexel University and researcher in CSCL, group cognition, CSCW, HCI, software design, collaboration, theory, philosophy, communications, interaction.

BookRix – The book community that connects authors and readers. Read and discuss free books online. Create, upload and share own books. Find new readers and get feedback.

Prezi is the zooming presentation editor