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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.

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Atlantico Books brings Brazilian Portuguese textbooks, other Brazilian books, and European Portuguese Books to North America. Get books in Portuguese to learn Brazilian Portuguese or learn European Portuguese. Feed your passion for the Portuguese-spe...

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

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Academia.edu helps academics follow the latest research.

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The Free Dictionary forum

Readcube is a free, simple, academic software and reference manager for researchers. Read Cube helps researchers organize, annotate and stay on top of new research literature.