000 00284nam a2200109Ia 4500
008 221226s9999 xx 000 0 und d
041 _aeng
082 _a333.7
_bSHA
100 _aSharma,J.P
_91438400
245 _aEnvironmental Studies
260 _aNew Delhi
_bUniversity Science Press
999 _c932774
_d932774