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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Webber, Edgar Ernest, - Wilce, Robert T.
    Type: Article
    In: Rhodora
    Volume: 73
    Date: 1971
    Page Range: 262--291
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],
  2. By: Wilce, Robert T. - Grocki, Walter
    Type: Article
    In: Rhodora
    Volume: 79
    Date: 1977
    Page Range: 292--299
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],
  3. By: Blum, John L. - Wilce, Robert T.
    Type: Article
    In: Rhodora
    Volume: 60
    Date: 1958
    Page Range: 283--288
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],
  4. By: Webber, Edgar Ernest, - Wilce, Robert T.
    Type: Article
    In: Rhodora
    Volume: 74
    Date: 1972
    Page Range: 475--488
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],