1917. Barrett, Wendell and Bushnell, T. M. (Thomas Mark),1889-1976. Map shows distribution of soil types by color and symbol. Soils surveyed by T.M . Bushnell of the U.S. Department of Agriculture, and Wendell Barre... The Bureau.
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1916. Barrett, Wendell and Bushnell, T. M. (Thomas Mark),1889-1976,cartographer,surveyor. A. Hoen & Co. Lith. Baltimore, Md.' Includes legend in margins. Scale 1:63,360. 1 inch = 1 mile. Soils surveyed by T.M. Bushnell of the U.S. Depart... United States Department of Agriculture, Bureau of Soils.
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.