Allen, Milton Arthur,  1890-    . <br/><br/>
Manganese, 
by M. A. Allen and G. M. Butler. 
 - Tucson, Ariz.,  University of Arizona, Bureau of mines  [1918] 
 - 32 p.  23 cm. 
 - Arizona. State bureau of mines. Bulletin  no. 91. Mineral technology series, no. 19 .
<br/><br/> Cover title.  At head of title: ... University of Arizona bulletin. 
<br/><br/>"References": p. 32. 
<br/><br/><label>LCCN: </label>gs 18000313  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Manganese.<br/>Manganese ores.
<br/><br/><label>LC Class. No.: </label>TN490.M3  / A4 
<br/><br/><label>Gov. Doc. Class. No.: </label>MN 1.3:B 85/91