000 00306nam a2200133Ia 4500
100 _aLayton, David
365 _b150
942 _cBK
654 _a
245 _aInnovations in science and technology education
260 _aNew Delhi
_bSterling Publishers
_c1987
082 _a375.5
300 _bHb
_a188
999 _c402891
_d402891
041 _aeng