000
00269nam a2200109Ia 4500
008
220201s1997 xx 000 0 eng d
100
_a
RAO, C.S.
245
0
_a
ENVIRONMENTAL POLLUTION CONTROL ENGINEERING
260
_b
NEW AGE INT.
_c
1997
300
_a
431
942
_2
ddc
999
_c
67714
_d
67714