Mccaskey H.D. Au. <br/><br/>
Mineral Resources of United states 1916. 
Mccaskey H.D. Au. 
 - Washington  Department of the Interior         1916 
 - iv; 871p.  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>X9(N1).73.N16, E9