Editore: NY: St. Martin's Press, 1958., 1958
Da: Sara Armstrong - Books, Cedarville, CA, U.S.A.
Membro dell'associazione: IOBA
143pp, (5.25 x 8.25 inches), b&w illustrations. Very Good condition in yellow wrappers wrappers (softcover). Just a trace of wear to covers, otherwise clean, bright and tight. No tears or creases, no bumps,no markings. No spine creasing. History and present day use in China and Japan, instructions for building your own abacus and directions for "becoming an expert.".