000			00321nam a22001217a 4500
999			_c8531 _d8531
008			200316b ||||| |||| 00| 0 eng d
100			_aSingh, Y. K.
245			_aEnvironmental Science
250			_aReprint 2019
260			_aNew Delhi _bNew Age International Publishers
650			_aBiology and EVS
942			_2ddc _cBK _08