The world coal-mining industry.
| Údar corparáideach: | |
|---|---|
| Formáid: | LEABHAR |
| Teanga: | English |
| Foilsithe / Cruthaithe: |
Nendeln
Kraus Reprint
1975.
|
| Sraith: | Studies and reports. Series B (Economic conditions)
nos. 31-32 |
| Ábhair: |