000 00263nam a22001097a 4500
020 _a9788121927642
100 _aD.K. ASTHANA
245 _aA TEXTBOOK OF ENVIRONMENTAL STUDIES
260 _aNEW DELHI
_bS. CHAND & COMPANY LTD
_c2009
300 _a460 P.
942 _cBK
999 _c7984
_d7984