Clype P, Ross. <br/><br/>
Routes to Desert Watering Places In The Lower gila Region, Arizona. 

 - Washington-US :   United States Geological Survey Bulletin,   1922. 
 - páginas 1-315 :   IIustraciones blanco y negro 
 - (1922) 
 - United States Geological Survey Bulletin ;    .
 - United States Geological Survey. .