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dever c ashmead

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Coal mines and mining -- PennsylvaniaAnthracite losses and reserves in Pennsylvania, by Dever C. Ashmead.Ashmead, Dever C. (Dever Campbell), b. 1884.

Anthracite losses and reserves in Pennsylvania, by Dever C. Ashmead.

Ashmead, Dever C. (Dever Campbell), b. 1884. · Pennsylvania Bureau of Topographic and Geologic Survey

78 sayfa · 1926

Coal mines and mining -- Pennsylvania

Coal minersEmployment and related statistics of mines and quarries, 1935F. G. Tryon, William Harvey Young, Malcolm Earl Wilson, F. E. Berquist, Maxine M. Otero, Dever C. Ashmead, National Research Project on Reemployment Opportunities and Recent Changes in Industrial Techniques (U.S.), United States. Bureau of Mines, United States. Bureau of the Census

Employment and related statistics of mines and quarries, 1935

F. G. Tryon, William Harvey Young, Malcolm Earl Wilson, F. E. Berquist, Maxine M. Otero, Dever C. Ashmead, National Research Project on Reemployment Opportunities and Recent Changes in Industrial Techniques (U.S.), United States. Bureau of Mines, United States. Bureau of the Census · Dept. of Commerce, Bureau of the Census

133 sayfa · 1937

Miners / Employment / Statistics / Coal mines and mining / Coal miners