00386nam a2200145 a 450000500170000002000150001708200180003210000120005024500330006226000560009530000190015149000440017070000150021470000110022920251203110120.0  a0883853000  a510.76,GILb_  aGilbert  aWhoascum county problem book  aNew YorkbMathematical Association of Americac1993  aix,233p.c20cm  aDolciani Mathematical expositiondno.14  aKrusemeyer  aLarson