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.

গ্রন্থ-পঞ্জীর বিবরন
সংস্থা লেখক: International Labor Office, Berthelot, M, International Labour Office, Lazard, M
বিন্যাস: গ্রন্থ
ভাষা:English
প্রকাশিত: [Geneva] Nendehln, Kraus Reprint 1975, 1920.
মালা:Studies and documents. Series B nos. 1-13
বিষয়গুলি:
Coal miners > Germany > Wetphalia.
Coal mines and mining > Germany > Westphalia.
Ruhr river and valley.