000 00331nam a2200145Ia 4500
008 230915s9999 xx 000 0 und d
082 _a AST
100 _aAsthana, D K
245 2 _aA Text Book Of Environmental Studies
260 _aNEW DELHI
260 _bS.CHAND
260 _c2006
300 _a460
650 _aManagement
999 _c160132
_d160132