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  1. A disease of pines caused by Cronartium pyriforme / by George G. Hedgcock and William H. Long.
    By: Hedgcock, George G. - Long, W. H.
    Publication info: Washington, D.C. :U.S. Dept. of Agriculture,1915.
    Contributed by: University of California Libraries (archive.org)
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  2. Parasitism of Comandra umbellata / by George G. Hedgcock.
    By: Hedgcock, George G.
    Publication info: Washington, D.C. :Dept. of Agriculture,1915.
    Contributed by: University of California Libraries (archive.org)
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