000
00296nam a2200121Ia 4500
008
220201s1984 xx 000 0 eng d
082
_a
628
_b
ALA
100
_a
Alam singh ed.
245
0
_a
Environmental engineering
260
_b
International book treaders
_c
1984
300
_a
248
942
_2
ddc
999
_c
83604
_d
83604