Search Results       Your search for [subject]Coal mines and mining -- Germany -- Westphalia returned 1 record.           Coal production in the Ruhr district (end of May 1920) : enquiry by the International Labour Office. [Geneva]: Nendehln, Kraus Reprint. Subject: Coal miners -- Germany -- Wetphalia; Coal mines and mining -- Germany -- Westphalia; Ruhr river and valley.          Add to Book Cart Relevance: 40.82%