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Edgemont folio, South Dakota-Nebraska

Darton, Nelson Horatio, 1865-1948.; Smith, W. S. Tangier (William Sidney Tangier), 1869-1962. (Geological Survey (United States), 1904)

Hartville folio, Wyoming

Smith, W. S. Tangier (William Sidney Tangier), 1869-1962. (Geological Survey (United States), 1903)

Joplin district folio, Missouri-Kansas

Smith, W. S. Tangier (William Sidney Tangier), 1869-1962. (Geological Survey (United States), 1907)

Sundance folio, Wyoming-South Dakota

Darton, Nelson Horatio, 1865-1948.; Smith, W. S. Tangier (William Sidney Tangier), 1869-1962. (Geological Survey (United States), 1905)