000 00269nam a2200109Ia 4500
008 170101s1977 xx 000 0 und d
082 _a370.025 NOR
100 _aNorback Peter G.
245 0 _aEducational Market Place
260 _bMcGraw Hill
_c1977
942 _2ddc
_cB
999 _c615316
_d615316