000			00360 a2200145 4500
082			_a301.3 _bSil/A
090			_c1951 _d1951
100			_aSil, Ajit
245			_aEnvironment _cAjit Sil
260			_aKolkata _bHimalayan BKs _c2002
300			_a157 p. _c22 cm.
500			_a3rd ed. 2007, reprint 2009, 169 p.
650			_aEnvironmental Science
942			_cBK
999			_c1854 _d1863