000 00286nam a22001217a 4500
020 _a9788172337551
082 _a574.5
_bVID
100 _aVidya Thakur
245 _aText book of environmental science
260 _aJodhpur
_bscientific publishers
_c2012
300 _a307
942 _cBK
999 _c368568
_d368568