000
00309nam a2200121Ia 4500
008
150331s1996 xx 000 0 und d
100
_a
Duggal, K.N.
245
_a
Elements Of Environmental Engineering
250
_a
1st
260
_a
New Delhi
_b
S. K. Kataria and Sons
_c
1996
300
_a
451
942
_2
ddc
_c
BK
999
_c
1775
_d
1775