Atwater, Mary <br/><br/>Changes in Ecosystems  -- U.S.A:  Macmillan/ McGraw-Hill Company,  1993. <br/><br/> Index <br/><br/><label>ISBN: </label>0022742883 <br/><br/><label>Dewey Class. No.: </label>GSL Cir. 500 At93 1993