Douglas, W. O. (1950). Of men and mountains. New York: Happer and Brothers Publishers.
Παραπομπή Chicago StyleDouglas, William O. Of Men and Mountains. New York: Happer and Brothers Publishers, 1950.
Παραπομπή MLADouglas, William O. Of Men and Mountains. New York: Happer and Brothers Publishers, 1950.
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