Model code of safety regulations for underground work in coal mines for the guidance of governments and of the coal-mining industry
- Språk
- Engelska
| Förlag | År | Ort | Om boken | ISBN |
|---|---|---|---|---|
| International Labour Office | 1950 | Schweiz, Geneva | 1 vol. (lösbl.) |
| Förlag | År | Ort | Om boken | ISBN |
|---|---|---|---|---|
| International Labour Office | 1950 | Schweiz, Geneva | 1 vol. (lösbl.) |