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.

Sonraí bibleagrafaíochta
Údair chorparáideacha: International Labor Office, Berthelot, M, International Labour Office, Lazard, M
Formáid: LEABHAR
Teanga:English
Foilsithe / Cruthaithe: [Geneva] Nendehln, Kraus Reprint 1975, 1920.
Sraith:Studies and documents. Series B nos. 1-13
Ábhair:
Coal miners > Germany > Wetphalia.
Coal mines and mining > Germany > Westphalia.
Ruhr river and valley.