1915. Barrett, Wendell, Bushnell, T. M. (Thomas Mark),1889-1976, and Grimes, E. J. (Earl Jerome),1893-cartographer. Detached from: Soil survey of Starke County, Indiana / E.J. Grimes, Wendell Barrett, and T.M. Bushnell. In 40th Annual report of Department of Geol... Indiana Department of Geology and Natural Resources, Fort Wayne, and Fort Wayne Printing Company.
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1915. Bushnell, T. M. (Thomas Mark),1889-1976 and Erni, C. P. (Chester Prall),1896-cartographer. Shows soil types classification by colors and symbols. 'Field Operations, Bureau of Soils, 1915.' 'Snyder & Black, N.Y.' Scale 1:63,360. 1 inch = 1... The Bureau.