Hall, Charles Francis (9 April 1871). "Geographical Discoveries in the Arctic Regions". Journal of the American Geographical Society of New York. 3. jstor.org: 216–221. doi:10.2307/196418. JSTOR196418.
jstor.org
Hall, Charles Francis (9 April 1871). "Geographical Discoveries in the Arctic Regions". Journal of the American Geographical Society of New York. 3. jstor.org: 216–221. doi:10.2307/196418. JSTOR196418.