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.

Dettagli Bibliografici
Enti autori: International Labor Office, Berthelot, M, International Labour Office, Lazard, M
Natura: Libro
Lingua:English
Pubblicazione: [Geneva] Nendehln, Kraus Reprint 1975, 1920.
Serie:Studies and documents. Series B nos. 1-13
Soggetti:
Coal miners > Germany > Wetphalia.
Coal mines and mining > Germany > Westphalia.
Ruhr river and valley.