Pennak Robert W <br/><br/>
Fresh-water invertebrates of the United States 

 -  1953 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>54064 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Invertebrates<br/>Zoology
<br/><br/><label>Dewey Class. No.: </label>K1-99557.73, J3