000			00281nam a22001337a 4500
003			AUM
020			_a9788173814044
100			_aSantra, S. C
245			_aEnvironmental Science
250			_a3rd
260			_aKolkatta _bNew central book _c2013
300			_a1529
942			_2ddc _cBK
999			_c3393 _d3393