Ten Years Of Work Experience Of Philadelphia Machinists
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Technology, Employment, and Output Per Man in Copper Mining
| Author | : Yau Sing Leong |
| Publisher | : |
| Total Pages | : 282 |
| Release | : 1940 |
| Genre | : Copper mines and mining |
| ISBN | : |
Industrial Change and Employment Opportunity
| Author | : National Research Project on Reemployment Opportunities and Recent Changes in Industrial Techniques (U.S.) |
| Publisher | : |
| Total Pages | : 278 |
| Release | : 1939 |
| Genre | : African Americans |
| ISBN | : |
Mechanization, Employment, and Output Per Man in Bituminous-coal Mining
| Author | : Willard Eugene Hotchkiss |
| Publisher | : |
| Total Pages | : 876 |
| Release | : 1939 |
| Genre | : Bituminous coal |
| ISBN | : |
Rock Drilling
| Author | : C. E. Nighman |
| Publisher | : |
| Total Pages | : 932 |
| Release | : 1940 |
| Genre | : Labor productivity |
| ISBN | : |
