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Project Gutenberg was the first provider of free electronic books, or eBooks. Michael Hart, founder of Project Gutenberg, invented eBooks in 1971 and his memory continues to inspire the creation of eBooks and related technologies today.Harper's Young People, February 28, 1882 by VariousAuthor: Various,Language: English, Class: AP: General Works: Periodicals, Release Date: Apr 8, 2017

《Absalons Br?nd》
《Ty?n orja》
《Natural & Artificial Sewage Treatment》
《Elements of Military Art and Science》
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