000 00310nam a2200133Ia 4500
700 _aBaker, Robert L.
100 _aBaker, Robert L.
942 _cBK
654 _a
245 _aInstructional product research
260 _aNew York
_bAmerican Book Company
_c1972
082 _a370.78
300 _axxviii,314
999 _c403659
_d403659
041 _aeng