Hewett, Donnel Foster,  1881- <br/><br/>
Silver in veins of hypogene manganese oxides, 
by D. F. Hewett. 
 - Washington  [U.S. Geological Survey]  1968. 
 - iii, 9 p.  map.  26 cm. 
 - Geological Survey circular 553 .
 - Geological Survey circular ;  553. .
<br/><br/>Bibliography: p. 8-9. 
<br/><br/><label>LCCN: </label>gs 68000188 //r892 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Manganese ores--Southwest, New.<br/>Manganese ores--Canada.<br/>Ore deposits--Southwest, New.
<br/><br/><label>LC Class. No.: </label>QE75  / .C5 no. 553 
<br/><br/><label>Dewey Class. No.: </label>553/.462