Spitzbergen, Norway. Coal Resources of the World.
Coal Resources of the World. Spitzbergen (Norway). Map No. 48. Geological Map of Spitzbergen from the Maps of Nordenskiold, De Geer, Tschernyschew, Backlund, Bruce, Hoel, and personal observations by A.G. Nathorst.
David RumseyHoel
1913
1913
Morang & Co.
1:2 000 000