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  1. By: Godfrey, R K - Adams, Preston
    Type: Article
    In: SIDA, contributions to botany.
    Volume: 1
    Date: 1964
    Page Range: 269--273
    Publication info: [Dallas :W. F. Mahler, etc.]1962-
  2. By: Adams, Preston
    Type: Article
    In: Rhodora
    Volume: 64
    Date: 1962
    Page Range: 231--242
    Publication info: [Cambridge, Mass., etc.]New England Botanical Club [etc.]