Bertholf, William Earl,  1915- <br/><br/>
Magnetite taconite rock in Precambrian formations in Rio Arriba County, New Mexico. 

 - Socorro,  State Bureau of Mines & Mineral Resources, New Mexico Institute of Mining & Technology,  1960. 
 - iv, 24 p.  illus., map, diagrs., tables.  28 cm. 
 - New Mexico. Bureau of Mines and Mineral Resources. Circular,  54 .
 - Circular (New Mexico. Bureau of Mines and Mineral Resources) ;  54. .
<br/><br/> Errata slip inserted. 
<br/><br/>Bibliography: p. 24. 
<br/><br/><label>LCCN: </label>gs 60000249  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Magnetite--New Mexico--Rio Arriba County.<br/>Rocks--Analysis.
<br/><br/><label>LC Class. No.: </label>TN24.N6  / A235 no. 54