000 00299nam a2200145Ia 4500
100 _aCSIR
020 _a81-85038-93-7
365 _b15
942 _cBK
654 _a
245 _aLearn science yourself
260 _aNew Delhi
_bCSIR
_c1991 # 1992
082 _a507
300 _bPb
_c23.2cm
_a128
999 _c385719
_d385719
041 _aeng