000
00293nam a2200109Ia 4500
008
220509s2012 xx 000 0 und d
041
_a
eng
082
_a
333.7
_b
DAW/TEX
100
_a
Dawan, Ashok
_9
771444
245
_a
A textbook of environmental studies
260
_a
New Delhi
_b
Saurabh
_c
2012
999
_c
522551
_d
522551