coal. Colorado Colorado coal faces new era. RMN May 20, 1931 p.1 Boulder county leads in increase of coal output. Peat Feb. 18, 1932 p.6 Big Colorado coal land lease granted to Colorado Pinnacle coal co. Post Map 26, 1932 p.7 State to begin probe of coal mine operator. RMN Feb. 15, 1936.p.1 Western coal producers <t work on code. Post Aug. 24, 1937 p.3 coal dealers complete market pact. RMN Aug. 27, 1937 p.14 0
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