000 00291nam a2200085Ia 4500
008 170620s9999 xx 000 0 und d
100 _aRao- Digumarti Bhaskara
245 0 _aInternational Encyclopedia of Science and Technology Education-1- Science and te
260 _bNew Delhi- Discovery Publishing House
260 _c2001
999 _c24394
_d24394