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.

Podrobná bibliografie
Korporace: International Labor Office, Berthelot, M, International Labour Office, Lazard, M
Médium: Kniha
Jazyk:English
Vydáno: [Geneva] Nendehln, Kraus Reprint 1975, 1920.
Edice:Studies and documents. Series B nos. 1-13
Témata:
Coal miners > Germany > Wetphalia.
Coal mines and mining > Germany > Westphalia.
Ruhr river and valley.