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  1. By: Pack, Dean A
    Type: Article
    In: Botanical gazette
    Volume: 71
    Issue: 1
    Date: 1921
    Page Range: 32--60
    Publication Info: Hanover, Ind, [publisher not identified], 1876-1991
  2. By: Pack, Dean A
    Type: Article
    In: Botanical gazette
    Volume: 72
    Issue: 3
    Date: 1921
    Page Range: 139--150
    Publication Info: Hanover, Ind, [publisher not identified], 1876-1991