The coal resources of the world : an inquiry made upon the initiative of the Executive Committee of the XII International Geological Congress, Canada, 1913, with the assistance of geological surveys and mining geologists of different countries. Vol. 1 - Dowling, Donaldson Bogart (1858-1925). Redakcja; Leach, W. W. Redakcja; McInnes, William (1858-1925). Redakcja (Morang & Co., 1913)
International Geological Congress (12 ; 1913)
Keywords: węgiel - zasoby - konferencja