Comparison of earnings and wage rates in the anthracite and bituminous mines of Pennsylvania /
presented by W. Jett Lauck on behalf of United Mine Workers of America.
|Main Author:||Lauck, W. Jett 1879-1949|
Washington : [s.n.], 1920.
Coal miners /
Wages > Wages / Pennsylvania.
At head of title : Before the United States Anthracite Coal Commission.
20 p. ;
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