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  1. 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
  2. By: Skinner, J J - Reid, F. R. (Frederic Robertson)
    Type: Article
    In: American journal of botany
    Volume: 6
    Issue: 4
    Date: 1919-04
    Page Range: 167--180
    Publication Info: Lancaster, Pa, Published in cooperation with the Botanical Society of America by the Brooklyn Botanic Gardens, 1914-