1916. Brill, J. Bayard and Jones, Grove B., 1877- cartographer. Shows soil types classification by colors and symbols. 'Field operations Bureau of Soils 1916.' 'Snyder & Black, N.Y.' Scale 1:63,360. 1 inch = 1 m... The Bureau.
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1949. Dempsey, W. J., Duffner, R. T., and Henderson, John R. Includes text and location map. Scale 1:63360. United States Department of the Interior, Geological Survey; aeromagnetic survey 1947 by W.J. Dempse... For sale by United States Geological Survey.