Vari, Richard P. <br/><br/>
The catfishes of the neotropical family helogenidae (Ostariophysi :  siluroidei) / 
Richard P. Vari, Hernan Ortega 
 - Washington :  Smithsonian Institution Press,  1986 
 - 20 p. :  ill. ;  28 cm. 
 - Smithsonian contributions to zoology  no.442 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Helogeneidae--Classification<br/>Catfishes--Classification<br/>Fishes--Classification<br/>Fishes--Latin America--Classification