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...s. First Sweet Potato Planning Conference, 1987. Lima, Peru: International Potato Center. pp. 27—60 archive-url https://books.google.com/books?id 7Ff-wrcqm ...Cite web url https://archive.org/details/sweetpotato00thot title The sweetpotato author Gad Loebenstein; George Thottappilly publisher (англ.). — 2009