000 00292nam a2200133Ia 4500
100 _aVockell, Edward L
365 _e
_29.95
942 _cBK
245 _aEducational research
260 _aNew York
_bMcGraw-Hill
_c1983
082 _a370.78
_bVoc
300 _aviii,392
546 _aEnglish
999 _c343526
_d343526
041 _aeng