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WikiPedia: Agropelter http://www.lib.lumberwoods.org/fclw/agropelter.htm... https://books.google.com/books?id=C_etr5HNEPkC https://books.google.com/books?id=sl8ZbOahpnYC&pg=... https://books.google.com/books?id=w61ZAAAAMAAJ https://web.archive.org/web/20140517115554/http://...