000 00237nam a2200097Ia 4500
942 _cBV
654 _a
245 _aJournal of Education & Psychology Vol;30-31 NO.4 To 12 -1 To 12
_bApril 1972-Jan 1974
260 _c1972
082 _a370.5
999 _c393153
_d393153
041 _aeng