000
00270nam a2200121Ia 4500
008
220201s1971 xx 000 0 eng d
082
_a
546
100
_a
Agarwal, OP
245
0
_a
Chemical bonding
260
_b
Dhanpat rai & sons
_c
1971
300
_a
143
942
_2
ddc
999
_c
76907
_d
76907