To students of Arctic exploration. The geographic position of Camp Jesup, and the reduction of the observations of R. E. Peary, in the vicinity of the North Pole
Hubbard, Thomas Hamlin, 1838-1915; Mitchell, Hugh C. (Hugh Chester), b. 1877; Duvall, Charles Raymond, 1869-; Peary, Robert E. (Robert Edwin), 1856-1920