Coal production in the Ruhr district (end of May 1920) enquiry by the International Labour Office.
| Corporate Authors: | , , , |
|---|---|
| Format: | Knjiga |
| Jezik: | angleščina |
| Izdano: |
[Geneva]
Nendehln, Kraus Reprint
1975, 1920.
|
| Serija: | Studies and documents. Series B
nos. 1-13 |
| Teme: |