000 00302nam a2200109Ia 4500
100 _aMukhopadhyay, M ed.
245 _aEducational technology :
_bChallenging issues /
_cedited by M Mukhopadhyay
260 _bsterling ,
_c1990.
_aNew Delhi :
300 _ax+225p. :
650 _aTechnology
942 _cGEN
999 _c110877
_d110877