Allen, Milton Arthur,  1890-    . <br/><br/>
Fluorspar, 
by M. A. Allen and G. M. Butler.  Published by the University of Arizona, Arizona Bureau of mines. 
 - Tucson, Ariz.,  1921. 
 - 19 p.  23 cm. 
 - [Arizona.  State bureau of mines]  Bulletin  no. 114.  Mineral technology series, no. 25 .
<br/><br/> At head of title: ... University of Arizona bulletin.  Cover title. 
<br/><br/>"Selected bibliography": p. 18-19. 
<br/><br/><label>LCCN: </label>gs 21000322  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fluorspar.
<br/><br/><label>LC Class. No.: </label>TN948.F6  / A4 
<br/><br/><label>Dewey Class. No.: </label>402(274)Ar4 
<br/><br/><label>Gov. Doc. Class. No.: </label>MN 1.3:B 85/114