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  1. The diminished flow of the Rock River in Wisconsin and Illinois : and its relation to the surrounding forests /
    By: Schwarz, G. Frederick
    Publication info: Washington, D.C. :U.S. Dept. of Agriculture, Bureau of Forestry,1903.
    Contributed by: U.S. Department of Agriculture, National Agricultural Library
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  2. The longleaf pine in virgin forest ; a silvical study, by G. Frederick Schwarz.
    By: Schwarz, G. Frederick
    Edition: 1st ed. 1st thousand.
    Publication info: New York :J. Wiley & sons; [etc., etc.],1907.
    Contributed by: University of British Columbia Library (archive.org)
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