Author: Yau Sing LeongPublisher:
ISBN:
Category : Copper mines and mining
Languages : en
Pages : 282
Book Description
Technology, Employment, and Output Per Man in Copper Mining PDF Download
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Author: Yau Sing LeongPublisher:
ISBN:
Category : Copper mines and mining
Languages : en
Pages : 282
Book Description
Author: Yau Sing Leong
Author: United States. Work Projects Administration
Author: 
Author: Yau Sing Leong
Author: C. E. Nighman
Author: Nicholas Yaworski
Author: United States. Bureau of Labor Statistics
Author: National Research Project on Reemployment Opportunities and Recent Changes in Industrial Techniques (U.S.)
Author: United States. Work Projects Administration
Author: United States. Bureau of Mines