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  1. By: Schreiner, Oswald
    Type: Article
    In: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge
    Volume: 52
    Issue: 210
    Date: 1913
    Page Range: 420--430
    Publication Info: Philadelphia, American Philosophical Society,
  2. By: Schreiner, Oswald - Skinner, J J
    Type: Article
    In: Botanical gazette
    Volume: 59
    Issue: 6
    Date: 1915
    Page Range: 445--463
    Publication Info: Hanover, Ind, [publisher not identified], 1876-1991