000			00315nam a22001337a 4500
003			OSt
008			231007b |||||||| |||| 00| 0 eng d
082			_a574.5 _bV98E
100			_aVyas, A.B.
245			_aEcological Principles
260			_aMetropolitan, New Delhi _bI.S.P. _c1975
300			_a127
942			_2ddc _cBK
999			_c32627 _d32627