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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Foster, H Lincoln
    Type: Article
    In: American fern journal
    Volume: 44
    Issue: 3
    Date: 1954
    Page Range: 114--114
    Publication Info: [Washington, etc.] American Fern Society
  2. By: Foster, H Lincoln
    Type: Article
    In: Rhodora
    Volume: 49
    Date: 1947
    Page Range: 116--116
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],