Поточный метод добычи угля в лавах на пологих пластах
| Main Author: | |
|---|---|
| Format: | Book |
| Language: | Russian |
| Published: |
М
Недра
1967
|
| Subjects: |
| Physical Description: | 128с |
|---|
| Main Author: | |
|---|---|
| Format: | Book |
| Language: | Russian |
| Published: |
М
Недра
1967
|
| Subjects: |
| Physical Description: | 128с |
|---|