00605cam a2200217 a 4500001000800000005001700008008004100025019001100066035002000077035001200097040002000109050001900129082001700148100001800165245005100183260004400234300003300278504003000311650001200341984003400353196121320180831182333.0690606c19691968nyua b 001 0 eng 1 a582017 9(AuCNLDY)168528 a1961213 aLCbengcLCdAK00aQA75b.P8 196904a511/.2078/091 aPullan, J. M.14aThe history of the abacus /c[by] J.M. Pullan. aNew York,bF. A. Praegerc[1969, c1968] axiii, 127 p.billus.c22 cm. aBibliography: p. 116-120. 0aAbacus. aANLc511.2078 P982 <00387428>