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.

التفاصيل البيبلوغرافية
مؤلفون مشاركون: International Labor Office, Berthelot, M, International Labour Office, Lazard, M
التنسيق: كتاب
اللغة:English
منشور في: [Geneva] Nendehln, Kraus Reprint 1975, 1920.
سلاسل:Studies and documents. Series B nos. 1-13
الموضوعات:
Coal miners > Germany > Wetphalia.
Coal mines and mining > Germany > Westphalia.
Ruhr river and valley.