00335nam a22001217a 4500082001100000100001100011245004300022260002700065300000800092942000700100999001700107952008900124  a510BEL  aBello   aContemporary basic mathematical skills  aNew YorkbHapperc1978  a421  cBK  c12280d12280  00104070aSLMSbSLMSd2015-02-11g217.00l0o510BELp7113r2015-02-11 00:00:00yBK