PENNAK, Robert W. <br/><br/>
Fresh-Water invertebrates of the United stated 
/by Robert W.Pennak 
 - 2nd ed. 
 - New York  A Wiley-Interscience pub.  1978 
 - xv, 803 p. 
<br/><br/> Includes appendix, references and index. 
<br/><br/><label>ISBN: </label>471042498 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Invertebrates
<br/><br/><label>Dewey Class. No.: </label>592  / PEN