000
00263nam a2200109Ia 4500
008
231221s9999 xx 000 0 und d
100
_a
SINGH Y.K
245
0
_a
ENVIRONMENTAL SCIENCE
260
_b
NEW AGE
_a
NEW DELHI
_c
2006
300
_a
VII, 310P
942
_c
BK
999
_c
10428
_d
10428