Cross, Whitman <br/><br/>
Dike Rocks of the apishapa quadrangle Colorado 

 - Washington  Government Printing Office  1914 
 - pp. 17-31 
<br/><br/> Impreso 
<br/><br/><br/>Ingles 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MINERIA