000			00322nam a2200133Ia 4500
008			140317s9999 xx 000 0 und d
082			_a574.52
100			_aLal,J.B.
245			_aEnvironmental conservation.
260			_aDehradun _bInter. Book Dist. _c1987
300			_a111
653			_aEnvironment
942			_2ddc _cBK
999			_c11469 _d11469