Petts, Geoffrey E. <br/><br/>
Rivers / 
Geoffrey E. Petts. 
 - London:  Butterworths,  1983. 
 - 228 p. 
 - Sources and methods in geography. .
<br/><br/><label>ISBN: </label>0435356356 
<br/><br/><label>LCCN: </label>90011122     
<br/><br/><label>Subjects--Topical Terms: </label><br/>Rivers.