000 00271nam a2200121Ia 4500
100 _aGupta, S.K.
942 _cBK
245 _aTechnology of science education
260 _aDelhi
_bVikas Pub. House
_c1983
082 _a375.5
_bGup
300 _a(8)98
546 _aEnglish
999 _c339742
_d339742
041 _aeng