Please read BHL's Acknowledgment of Harmful Content
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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 (Clyde 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.]