1913. Quinn, E. J. (Edward J.) and Tharp, W. E. (William Edgar). Shows soil types classification by colors and symbols. 'Field Operations, Bureau of Soils, 1913.' 'A Hoen & Co Lith Baltimore Md.' Scale 1:63,360. ... Bureau of Soils.
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1913. Coryell, Horace Noble,1888-1965. Detached from: Soil survey of Vermillion County / H.N. Coryell. In 38th Annual report of Department of Geology and Natural Resources, Indiana. Scal... Indiana Department of Geology and Natural Resources and William B. Burford.