000 00411nam a2200169Ia 4500
008 180424s9999 xx 000 0 und d
084 _a507 K1
100 _a"Kalra, R M"
245 0 _aInnovations in Science Teaching
250 _a\\197600ENGGPSX
260 _aOxford and IBH
260 _b1976
260 _cNew Delhi
300 _axvi+152 p
500 _aincludes index and biblioraphy
942 _cBK
999 _c39026
_d39026