Horak, Steven A. <br/><br/>World Book's Animals of the World  Swans and Other Swimming Birds  -- Singapore:  World Book, Inc.,  2001. <br/><br/> Includes index <br/><br/><label>ISBN: </label>0716612178 <br/><br/><label>Dewey Class. No.: </label>GS Gen. Ref 599.418 Sw1 2001