Hoel, Adolf (July 1935). "The Discovery of King Karl Land, Spitsbergen". The Geographical Review. XXV (3). New York: American Geographical Society: 476–478. Bibcode:1935GeoRv..25..476H. doi:10.2307/209316. JSTOR209316.
harvard.edu
ui.adsabs.harvard.edu
Hoel, Adolf (July 1935). "The Discovery of King Karl Land, Spitsbergen". The Geographical Review. XXV (3). New York: American Geographical Society: 476–478. Bibcode:1935GeoRv..25..476H. doi:10.2307/209316. JSTOR209316.
jstor.org
Hoel, Adolf (July 1935). "The Discovery of King Karl Land, Spitsbergen". The Geographical Review. XXV (3). New York: American Geographical Society: 476–478. Bibcode:1935GeoRv..25..476H. doi:10.2307/209316. JSTOR209316.