Butler, G. M.  1881- <br/><br/>
Petrology, condensed and simplified. 

 - Tucson,  University of Arizona Press,  1959. 
 - 29 p.  diagr., tables.  23 cm. 
 - Mineral technology series,  no. 50 .
 - Arizona. Bureau of Mines. Bulletin  no. 166 University of Arizona bulletin,  v. 30, no. 1, September 1959 .
 - University of Arizona.  State Bureau of Mines.  Bulletin ;  no. 166. .
 - Bulletin (University of Arizona) ;  v. 30, no. 1. .
<br/><br/><label>LCCN: </label>gs 59000261  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Petrology.
<br/><br/><label>LC Class. No.: </label>QE431  / .B93 
<br/><br/><label>Gov. Doc. Class. No.: </label>MN 1.3:B 85/166