000 00308nam a2200121 4500
020 _a8121927641
100 _aD. K. Asthana
245 _aA Textbook of Environmental Studies
264 _aIndia
_bS. Chand & Company Ltd
_c2006
300 _a460p.
_bill.
650 0 _aEnvironmental Studies
942 _2lcc
_cBK
999 _c14829
_d14829