French, D., Pokorny, J. 1991. Leaf and Needle Diseases of Trees. University of Minnesota Extension Service Miscellaneous Publication AG-MI-0766-S.
2 pages. Illustrated.
University of Minnesota Extension Service.
French, D.W.; Pokorny, Jill D..
Leaf and Needle Diseases of Trees.
St. Paul, MN: University of Minnesota Extension Service.
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