Horse Collar and Hame

1941

Related works

United States Geological Survey, 1935

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United States Geological Survey, 1940

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United States Geological Survey, 1942

United States Geological Survey, 1938

United States Geological Survey, 1940

United States Geological Survey, 1940

United States Geological Survey, 1938

United States Geological Survey, 1935

United States Geological Survey, 1937