Научная организация труда при проведении горных выработок
| Main Author: | |
|---|---|
| Format: | Book |
| Language: | Russian |
| Published: |
М
Недра
1969
|
| Subjects: |
| Main Author: | |
|---|---|
| Format: | Book |
| Language: | Russian |
| Published: |
М
Недра
1969
|
| Subjects: |