Kenk, Roman, 1898-  Kenk, Roman, 1898- <br/><br/>
Freshwater triclads (Turbellaria) of North America, V: the genus Polycelis. 

 - Washington,  Smithsonian Institution Press; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.]  1973. 
 - Smithsonian contributions to zoology ;  no. 135 .
<br/><br/>Bibliography: p. 14-15. 
<br/><br/><label>ISBN: </label>  
<br/><br/><label>LCCN: </label>72007410 //r85 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Polycelis.<br/>Turbellaria -- North America.--Turbellaria -- North America.
<br/><br/><label>LC Class. No.: </label>QL1  QL391.T75  / .S54 no. 135 
<br/><br/><label>Dewey Class. No.: </label>591/.08 s  595/.123