Ventilation of the Large Copper Mines of Arizona
Description:
Introduction: "This bulletin discusses ventilation methods, practices, and costs at 11 large copper mines in Arizona, as obtained by brief personal studies and from supplementary information furnished by the mine managements. These mines were visited from December, 1928, to November, 1929, and the methods and practices in use when visited are described in some detail."
Date:
1930
Creator:
McElroy, G. E.
Item Type:
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