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Mechanization, employment, and output per man in bituminous-coal mining
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| Corporate Authors: | , |
|---|---|
| Contributors: | |
| Format: | Book |
| Language: | English |
| Published: |
Philadelphia, Pa. :
Work Projects Administration, National Research Project in cooperation with Dept. of the Interior, Bureau of Mines,
[1939]
|
| Series: | Mineral technology and output per man studies ;
report no. E-9 |
| Subjects and Genres: | |
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| Call Number: |
TN23.N35 |
|---|---|
| Copy 1 | Available |