Technology, employment, and output per man in iron mining /
Saved in:
| Main Author: | |
|---|---|
| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Philadelphia, Pennsylvania :
Work Projects Administration, National Research Project : Department of the Interior, Bureau of Mines,
1940.
|
| Series: | Mineral technology and output per man studies ;
rept. no. E-13. |
| Subjects: | |
| Online Access: | CONNECT |
