Author : W. I. Nelson
Publisher :
Page : 30 pages
File Size : 37,72 MB
Release : 1932
Category : Copper mines and mining
ISBN :
Author : United States. Bureau of Mines
Publisher :
Page : 50 pages
File Size : 23,53 MB
Release : 1932
Category :
ISBN :
Author : United States. Bureau of Mines
Publisher :
Page : pages
File Size : 20,80 MB
Release : 1932
Category :
ISBN :
Author : J. B. Carman
Publisher :
Page : 52 pages
File Size : 48,86 MB
Release : 1932
Category : Molybdenum ores
ISBN :
Author :
Publisher :
Page : 192 pages
File Size : 25,19 MB
Release : 1936
Category :
ISBN :
Author : Thomas Garfield Chapman
Publisher :
Page : 174 pages
File Size : 49,75 MB
Release : 1936
Category : Copper ores
ISBN :
Author : Albert Lawrence Godbert
Publisher :
Page : 1200 pages
File Size : 16,81 MB
Release : 1935
Category : Chemistry, Inorganic
ISBN :
Author : T. G. Chapman
Publisher :
Page : 56 pages
File Size : 41,74 MB
Release : 1934
Category : Copper mines and mining
ISBN :
During the past 20 years the milling of copper ores as practiced in the larger concentrators has changed to such an extent that comparatively few of the machines in use at the beginning of this period remain in service today.
Author : United States. Bureau of Mines
Publisher :
Page : 1442 pages
File Size : 30,55 MB
Release : 1935
Category :
ISBN :
Author : Daniel Harrington
Publisher :
Page : 1206 pages
File Size : 31,79 MB
Release : 1939
Category : Coal mine accidents
ISBN :
