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  1. By: Ahles, Harry E
    Type: Article
    In: SIDA, contributions to botany.
    Volume: 3
    Date: 1967
    Page Range: 186--187
    Publication info: [Dallas :W. F. Mahler, etc.]1962-
  2. By: Ahles, Harry E - Bell, C Ritchie - Radford, Albert E
    Type: Article
    In: Rhodora
    Volume: 60
    Date: 1958
    Page Range: 10--32
    Publication info: [Cambridge, Mass., etc.]New England Botanical Club [etc.]