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.

Dades bibliogràfiques
Autor corporatiu: International Labor Office, Berthelot, M, International Labour Office, Lazard, M
Format: Llibre
Idioma:English
Publicat: [Geneva] Nendehln, Kraus Reprint 1975, 1920.
Col·lecció:Studies and documents. Series B nos. 1-13
Matèries:
Coal miners > Germany > Wetphalia.
Coal mines and mining > Germany > Westphalia.
Ruhr river and valley.