Gertsch, Willis J.  1906-1998 <br/><br/>
The north american bolas spiders of the genera mastophora and Agatostichus / 
Willis J. Gertsch. 
 -- New York :   [s.n.],   1955 
 - p. 225-254. -- 
 (Bulletin of the American Museum of Natural History  ;  106, 4).
<br/><br/><label>Subjects--Topical Terms: </label><br/>Arácnidos<br/>Arañas
<br/><br/><label>Universal Decimal Class. No.: </label>595.4