Brooks Range, Glacier arm and moraine of Arr-4 glacier, from camera station 2-62, on threshold of a hanging cirque. P.S. Smith 570b. "Please credit Smith, P.S. 570 U.S. Geological Survey" [stamp]. Figure 4A "Comparative Glacier Photographs From Northern Alaska" by Thomas D. Hamilton.
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Brooks Range, Glacier arm and moraine of Arr-4 glacier, from camera station 2-62, on threshold of a hanging cirque. P.S. Smith 570b. "Please credit Smith, P.S. 570 U.S. Geological Survey" [stamp]. Figure 4A "Comparative Glacier Photographs From Northern Alaska" by Thomas D. Hamilton.
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