Killeen, P.L. <br/><br/>
Geological Survey. Bulletin ;   no. 1024 

 - Washington-US :   Goverment Printing Office,   1955. 
 - páginas 59-94 
 - Irregular 
 - No. 1024 (1955) 
 - Geological Survey. Bulletin ;   no. 1024 .
 - Goverment Printing Office. .