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  1. By: Fryxell, Paul A. - Krapovickas, Antonio - Crewz, David W.
    Type: Article
    In: SIDA, contributions to botany
    Volume: 10
    Date: 1984
    Page Range: 319--320
    Publication Info: [Dallas, W. F. Mahler, etc.], 1962-
  2. By: Crewz, David W. - Moffler, Mark D
    Type: Article
    In: Phytologia
    Volume: 52
    Issue: 5
    Date: 1983
    Page Range: 288
    Publication Info: Bronx Park, New York H.A. Gleason and H.N. Moldenke