Needham, Paul R. <br/><br/>
Trout streams;  conditions that determine their productivity and suggestions for stream and lake management, 

 - San Francisco,  Holden-Day  [1969] 
 - x, 241 p.  illus.  24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trout.<br/>Fishery management.
<br/><br/><label>Dewey Class. No.: </label>639 HOL 1969 A107 Or.