000 00275nam a2200121Ia 4500
100 _aKhan Mohd. Sarif
942 _cBK
245 _aEducational Research
260 _aNew Delhi
_bAshish Pub;ication
_c1990
082 _a370.78
_bKha
300 _aviii,164
546 _aEnglish
999 _c336852
_d336852
041 _aeng