Stirton, R. A.  1901-1966. <br/><br/>
Relationships of the protoceratid artiodactyls and description of a new genus / 
by R. A. Stirton. 
 - Berkeley ;  Los Angeles :  University of California Press,  1967. 
 - 44 p.  illus. ;  26 cm. 
 - University of California publications in geological sciences  v. 72 .
<br/><br/>Bibliography: p. 27-28. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Protoceratidae.<br/>Lambdoceras.