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  1. Grades for commercial corn /
    By: Duvel, J. W. T.
    Publication info: Washington, D.C. :U.S. Dept. of Agriculture,1915.
    Contributed by: U.S. Department of Agriculture, National Agricultural Library
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  2. The shrinkage of shelled corn while in cars in transit /
    By: Duvel, J. W. T. - Duval, Laurel.
    Publication info: Washington, D.C. :U.S. Dept. of Agriculture,1913.
    Contributed by: U.S. Department of Agriculture, National Agricultural Library
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  3. Sources of the Ohio flora, by A.D. Selby and J.W.T. Duvel.
    By: Selby, A. D. - Duvel, J. W. T.
    Publication info: Columbus,1899
    Contributed by: New York Botanical Garden, LuEsther T. Mertz Library
    BHL Collections: New York Botanical Garden
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  4. Speculative transactions in the 1926 May wheat future / by J.W.T. Duvel and G. Wright Hoffman.
    By: Duvel, J. W. T. - Hoffman, G. Wright - United States.
    Publication info: Washington, D.C. :U.S. Dept. of Agriculture,1927.
    Contributed by: U.S. Department of Agriculture, National Agricultural Library
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