Pennak, Robert W. <br/><br/>
Fresh-water invertebrates of the United States 
by Robert W. Pennak 
 - 2d ed. 
 - New York  Wiley  c1978 
 - xv, 803 p.  ill.  26 cm. 
<br/><br/> "A Wiley-Interscience publication." 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Freshwater invertebrates--United States
<br/><br/><label>Dewey Class. No.: </label>592  / .09  / 2973