Mineral economics / 
By h. f. bain... [y otros.] ; ed. by f. g. tryon and e. c. eckel 
 - 311 páginas 
 - Aime series .
<br/><br/> "lectures under the auspices of the brookings institution" 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Minas y riquezas minerales<br/>Industria minera--Producción
<br/><br/><label>LC Class. No.: </label>HD9506  / M55