Brooks And Others, Alfred H. <br/><br/>
United States Geological Survey Bulletin ;   no.642 

 - Washington-US :   United States Geological Survey Bulletin,   1916. 
 - páginas 3-279 :   IIustraciones blanco y negro 
 - No. 642 (1916) 
 - United States Geological Survey Bulletin ;   no.642 .
 - United States Geological Survey. .