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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.The Second Story of Meno by UnknownAuthor: Unknown,Language: English, Class: QA: Science: Mathematics, Release Date: Jul 9, 2008

《Scientific American, Volume XLIII., No. 25, December 18, 1880》
《The Sense of Taste》
《A New Atmosphere》
《Encyclopaedia Britannica, 11th Edition, Franciscans to French Language》
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