Schaller, Waldemar T. <br/><br/>
Gems and precious stones in 1916. 

 - Washington, D.C.  Government Printing Office  1918 
 - pp. 887-899 
 - Mineral Resources of the United States, 1916-Part II. .
<br/><br/> Impreso 
<br/><br/><br/>Ingles 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MINERIA<br/>GEMAS<br/>PIEDRAS PRECIOSAS
<br/><br/><label>Dewey Class. No.: </label>553.8