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Cyphering Books Prepared in the North American Colonies (but Not Canada), Or in the United States of America, 1667-1907
註釋This book summarizes the North-American (excluding Canada) cyphering books in the Ellerton-Clements collection, as of December 3rd, 2017. The collection, which is the largest collection of North American cyphering books in the world, was created during the period 2005¿2017 by Nerida Ellerton and Ken Clements.