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  1. By: Hill, S R
    Type: Article
    In: Rhodora
    Volume: 98
    Date: 1996
    Page Range: 180--216
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],
  2. By: Hill, S R
    Type: Article
    In: Rhodora
    Volume: 78
    Date: 1976
    Page Range: 25--36
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],
  3. By: Hill, S R
    Type: Article
    In: Rhodora
    Volume: 76
    Date: 1974
    Page Range: 471--477
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],