000			00301nam a2200133Ia 4500
999			_c58012 _d58012
020			_a9788183711111
100			_aRaghavan Nambiar K
245			_aTextbook of Environmental Studies
250			_a2
260			_bScitech Publications _aChennai _c2008
260			_c2008
300			_a8.11
942			_cBK