000 00341nam a2200145Ia 4500
008 230913s9999 xx 000 0 und d
082 _a526 GUP
100 _aGupta, K.M.
245 0 _aEnvironmental Studies
260 _aNEW DELHI
260 _bUMESH PUBLICATIONS
260 _c2005
300 _a336
650 _aEnvironmental Science
999 _c145742
_d145742