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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Burk, Carl John, - Lauermann, S D
    Type: Article
    In: Rhodora
    Volume: 79
    Date: 1977
    Page Range: 305--307
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],
  2. By: Lauermann, S D - Burk, Carl John,
    Type: Article
    In: Rhodora
    Volume: 78
    Date: 1976
    Page Range: 707--726
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],
  3. By: Burk, Carl John, - Lauermann, S D - Mesrobian, A L
    Type: Article
    In: Rhodora
    Volume: 78
    Date: 1976
    Page Range: 767--772
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],