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.

מידע ביבליוגרפי
Corporate Authors: International Labor Office, Berthelot, M, International Labour Office, Lazard, M
פורמט: ספר
שפה:English
יצא לאור: [Geneva] Nendehln, Kraus Reprint 1975, 1920.
סדרה:Studies and documents. Series B nos. 1-13
נושאים:
Coal miners > Germany > Wetphalia.
Coal mines and mining > Germany > Westphalia.
Ruhr river and valley.