000 00288nam a22001217a 4500
999 _c346
_d346
020 _a9788121927642
082 _a333.707
100 _aDr.D.K.Asthana & Meera Asthana
245 _aA Textbook of Environmental Studies
260 _aNew Delhi
_bS. Chand
_c2010
300 _a460
942 _cBK
_04