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/>Includes bibliographies and index. 
<br/><br/><label>ISBN: </label>0471042498 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Freshwater invertebrates--United States.
<br/><br/><label>LC Class. No.: </label>QL141  / .P45 1978 
<br/><br/><label>Dewey Class. No.: </label>592/.09/2973