Singewlad, Quentin D. <br/><br/>
Sugar laof and st. Kevin Mining Districts lake coutry, Colorado. 

 - Washington-US :   Goverment Printing Office,   1955. 
 - páginas 251-297 
 - Irregular 
 - No. 1027 (1955) 
 - Geological Survey. Bulletin ;   no. 1027 .
 - Goverment Printing Office. .