Author: Yau Sing Leong
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ISBN:
Category : Copper mines and mining
Languages : en
Pages : 282
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Author: United States. Work Projects Administration
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ISBN:
Category :
Languages : en
Pages : 282
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Author: C. E. Nighman
Publisher:
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Category : Copper mines and mining
Languages : en
Pages : 0
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Author: Nicholas Yaworski
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ISBN:
Category : Economics
Languages : en
Pages : 294
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Author:
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ISBN:
Category : Mineral industries
Languages : en
Pages : 1308
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Author: United States. Bureau of Mines
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ISBN:
Category : Mineral industries
Languages : en
Pages : 532
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Author: National Research Project on Reemployment Opportunities and Recent Changes in Industrial Techniques (U.S.)
Publisher:
ISBN:
Category : Mineral industries
Languages : en
Pages : 282
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Author: Vivian Eberle Spencer
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ISBN:
Category : Industries
Languages : en
Pages : 200
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Author:
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ISBN:
Category : Labor
Languages : en
Pages : 1214
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Author: Laura Huyett Spatz
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ISBN:
Category : Labor productivity
Languages : en
Pages : 200
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