Excerpt from Illinois Mineral Industry in 1946 The depletion of certain favorably located and high - grade mineral deposits has given rise to a fear of mineral
Excerpt from Illinois Mineral Industry in 1948 For years 1914-1922, Incl. - U. S. Geological Survey, Mineral Resources of United States. About the Publisher For
Excerpt from Illinois Mineral Industry in 1947 Not only is Illinois an important pro d'ucer of minerals, but _it also ranks high as a center for the processing
Excerpt from Illinois Mineral Industry in 1945 This report is made possible through the cooperation of the Bureau of Mines of the United States Department of th