Hershler, Robert <br/><br/>
A revision of the North American freshwater snail genus fontigens (prosobranchia  Hydrobiidae) 
Robert Hershler, John R. Holsinger, and Leslie Hubricht 
 - Washington  Smithsonian Institution Press  1990 
 - 49 p. : ill. ; 28 cm. 
 - Smithsonian contributions to zoology  no. 509 .
<br/><br/><label>LCCN: </label>90-010130 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fotigens--North America--Classification