Usinger, Robert L <br/><br/>
life of rivers and streams 

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 - New York  McGraw-Hill  1967 
 - 237p.   
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<br/><br/><label>Subjects--Index Terms: </label>Zoology  Birds  life of rivers  life of streams 
<br/><br/><label>Dewey Class. No.: </label>591(282)