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- Whittlesey, Charles, 1808-18864
- Mackall, Joe3
- United States. Bureau of the Census2
- Baughman, A. J. (Abraham J.), 1838-19131
- Brown, D. L. (Dennis L.)1
- Burns, Mary Hamilton1
- Hamilton, Charles C. (Charles Conrad), 1873-19641
- Loomer, C. W. (Charles William), 1914-1
- Northwest Regional Planning Commission1
- Ohio Agricultural Research and Development Center1
- Ohio. Division of Lands and Soil1
- Redmond, C. E. (Charles Edward), 1932-1
- Turk, Jesse M.1
- United States. Natural Resources Conservation Service1
- United States. Soil Conservation Service1
- University of Wisconsin--Madison. College of Agricultural and Life Sciences. Research Division1
- University of Wisconsin. Extension Service1
- Whitson, A. R. (Andrew Robeson), 1870-19451
- Writers' Program (Ohio)1
- ebrary, Inc1