000 00321nam a2200133Ia 4500
008 220201s2015 xx 000 0 eng d
082 _a628.1
_bCHA
100 _aChauhan, B.S.
245 0 _aEnvironmental studies
250 _a2nd ed
260 _aNew Delhi
_bUniversity Press
_c2015
300 _a281p.
942 _2ddc
_01
999 _c37850
_d37850