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By "Bushnell, T. M. (Thomas Mark), 1889-"
Soil survey of Porter County, Indiana / by T.M. Bushnell and Wendell Barrett.
By: Bushnell, T. M. - Barrett, Wendell. - Indiana. - United States.
Publication info: Washington :Govt. Print. Office,1918.
Contributed by: University of California Libraries (archive.org)