000 00270nam a2200121Ia 4500
008 220201s1971 xx 000 0 eng d
082 _a546
100 _aAgarwal, OP
245 0 _aChemical bonding
260 _bDhanpat rai & sons
_c1971
300 _a143
942 _2ddc
999 _c76907
_d76907