000 00277nam a2200133Ia 4500
100 _aRai, B.C.
365 _b6
942 _cBK
654 _a
245 _aMethod Teaching of science
260 _aLucknow
_bPrakashan Kendra
_c1975
082 _a375.5
300 _bHb
_aix,161
999 _c360234
_d360234
041 _aeng