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Keywords: Instrument tent on hill w M29C weasel.jpg en Weasels were still used after snow started melting on the tundra Tent used as wind break to reduce vibration of observing instrument Alaska Colville Delta NOAA Photolibrary http //www photolib noaa gov/htmls/corp0011 htm Harley D Nygren 1951 PD-USGov Photographs by Harley D Nygren M29 Weasel United States Coast and Geodetic Survey 1951 in Alaska Tundra of Alaska |