Coal production in the Ruhr district (end of May 1920) enquiry by the International Labour Office.

Coal production in the Ruhr district (end of May 1920) enquiry by the International Labour Office.

Bibliografische gegevens
Coauteurs: International Labor Office, Berthelot, M, International Labour Office, Lazard, M
Formaat: Boek
Taal:English
Gepubliceerd in: [Geneva] Nendehln, Kraus Reprint 1975, 1920.
Reeks:Studies and documents. Series B nos. 1-13
Onderwerpen:
Coal miners > Germany > Wetphalia.
Coal mines and mining > Germany > Westphalia.
Ruhr river and valley.