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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.Seeds of Michigan Weeds by W. J. BealAuthor: Beal, W. J. (William James), 1833-1924,Language: English, Class: SB: Agriculture: Plant culture, Release Date: Sep 9, 2010

《The Chemistry of Food and Nutrition》
《L‘Illustration, No. 0073, 18 Juillet 1844》
《Domesday Book》
《Debit and Credit》
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