000
00297nam a2200121Ia 4500
008
220201s2000 xx 000 0 eng d
100
_a
CHOUDHARY A K
245
0
_a
ENVIRONMENTAL ENGINEERING
260
_a
DELHI
_b
DHANPAT RAI AND SONS
_c
2000
300
_a
145
700
_a
OM PRAKASH
942
_2
ddc
999
_c
92714
_d
92714