00604 a2200169 4500020001800000082001000018090001500028100001800043245007300061260003400134300001100168650003600179700001800215942001800233999001700251952016600268 a9780140124996 a510.7 c7051d7051 aPolya, George aHow to solve it: A new aspect of mathematical method.c George Polya aNew YorkbPenguin Groupc1990 a253 p. aMathematics--Study and teaching a George Polya cBKk510.7 POL c10859d10859 001040708NFICaCLbCLcGENd2012-04-19eEagle Information Marketingg1178.34l7m4o510.7 POLpSEECS011214q2023-07-27r2023-06-27s2023-06-27w2017-01-05yBK