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1. Mine air-conditioning chart, for mixtures of air and water vapor, moist air, at barometric pressures of 22″ to 34″ Hg; prepared by G. E. McElroy.

Corporate/Agency Authors:: Mines Bureau and Interior Dept.
Publisher:: Mines Bureau
Date:: [1949.]
SuDoc number:: I 28.72:M 66/949

2. Maps. Coal. Total distribution of bituminous coal and lignite during year ended June 30, 1944, by district of origin and State of destination (in thousands of net tons of 2,000 pounds); [outline map], n. p.

Corporate/Agency Authors:: Mines Bureau
Publisher:: Mines Bureau
Date:: [1945]
SuDoc number:: I 28.72:C 63/944