000 00272nam a2200121Ia 4500
100 _aGates, Arthur I.
942 _cBK
654 _a
245 _aEducational psychology
260 _aNew York
_bMacmillan Publishing Company
_c1930
082 _a370.15
300 _axx,818
999 _c415509
_d415509
041 _aeng