000 00352nam a2200169Ia 4500
008 190201s9999 xx 000 0 und d
020 _a9.79E+12
082 _a510
082 _bPOL
100 _a"Polya, G."
245 0 _aHow To Solve It
250 _aSecond
260 _aNew Delhi
260 _bP.H.I.
260 _c1985
300 _a"xxi,253"
999 _c41794
_d41794