00839nam0 2200277 450 00002271020090209120811.0047108975320090209d1981----km-y0itay50------baengUSa-------001yyMathematical discoveryon understanding, learning, and teaching problem solvingGeorge PolyaCombined edNew YorkWileyc1981XXV, 220 p.graf.23 cm001000022413Mathematical discovery45823matematicaEsercizi51020MatematicaPolya,George440683ITUNIPARTHENOPE200900209RICAUNIMARC000022710S 510/18S 1061DSA2009Mathematical discovery45823UNIPARTHENOPE