Great rivers of the world 
/ N.G.S. 
 - Washington, D.C.  : National Geographic Society  , c1984. 
 - 448p.  : il. maps. retrs. 
<br/><br/><label>ISBN: </label>0-87044-537-5 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Rivers<br/>Stream ecology
<br/><br/><label>Dewey Class. No.: </label>REF 910 NAT