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Please read BHL's Acknowledgment of Harmful Content
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  1. By: McDonald, Philip M. - United States. Forest Service.
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, Forest Service, [1973]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  1. By: McDonald, Philip M. - Littrell, Edward E
    Type: Article
    In: Madroño; a West American journal of botany
    Volume: 23
    Date: 1976
    Page Range: 310--320
    Publication Info: Berkeley, California Botanical Society,
  2. By: McDonald, Philip M. - Zhang, Jianwei - Senock, Randy S - Wright, Jessica W
    Type: Article
    In: Madroño; a West American journal of botany
    Volume: 60
    Date: 2013
    Page Range: 107--117
    Publication Info: Berkeley, California Botanical Society,