000 00261nam a2200109Ia 4500
008 160710s1974 xx 000 0 und d
100 _aWICKELGREN,W.A.
245 _aHOW TO SOLVE PROBLEMS
260 _bW.H FREEMAN & CO.
_c1974
300 _a262
942 _2ddc
_cB
999 _c37119
_d37119