Miners' wages and the cost of coal; an inquiry into the wages system in the bituminous coal industry and its effects on coal costs and coal conservation
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| Formatua: | Liburua |
| Hizkuntza: | English |
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New York
McGraw-Hill book company
1924.
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| Saila: | Half-title : The Institute of economics. Investigations in industry and labor
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| Gaiak: |