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by Jeffers, Richard M.
[Saint Paul, Minn.] : North Central Forest Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1980
[Saint Paul, Minn.] : North Central Forest Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1980
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Athens, Ga. : Springfield, Va. : Environmental Protection Agency, Office of Research and Development, Environmental Research Laboratory ; for sale by the National Techincal Information Service, 1977
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by Schlesinger, Richard C. (Richard Cary), 1940-
[St. Paul] : U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station, 1976
[St. Paul] : U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station, 1976
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by Williamson, Malcolm J., 1914-
Columbus, Ohio : U.S. Dept. of Agriculture, Forest Service, Central States Forest Experiment Station, 1957
Columbus, Ohio : U.S. Dept. of Agriculture, Forest Service, Central States Forest Experiment Station, 1957
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