Columbia subject headings:
Cook, Frederick Albert, 1865-1940.
North Pole.
Peary, Robert E. (Robert Edwin), 1856-1920.
Harvard subject headings:
Cook, Frederick Albert, 1865-1940.
North Pole.
Peary, Robert E. (Robert Edwin), 1856-1920.
Princeton subject headings:
Cook, Frederick Albert, 1865-1940.
North Pole.
Peary, Robert E. (Robert Edwin), 1856-1920.