Mines and mineral resources. Colorado 1938 Yines working at faster pace. Post, Sept. 11, 1938, n.? Three-mile tunnel will top sunnyside mines. Post, Sept. 11, 1938, p. 17 $56'504 of federal money from mineral leases ready for state. News, Oct. 15, 1938, p. 7 Plans for W P A work. RMN June 9, 1938 p.1 Mine output at new low. RMN June 23, 1938 p.14
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