000
00311nam a2200121Ia 4500
008
180721s9999 xx 000 0 und d
100
_a
"Singh, B.S. & et.al"
245
0
_a
Water pollution and Environment
260
_b
"Enkay Publishing House, New Delhi"
260
_c
2012
365
_b
825.00
942
_c
BK
999
_c
150189
_d
150189