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  1. By: Haas, Theodor Philipp
    Type: Article
    In: Journal of the New York Botanical Garden
    Volume: 43
    Issue: 514
    Date: 1942-10
    Page Range: 248--251
    Publication Info: Lancaster, Pa, Published for the Garden by the New Era Printing Co, 1900-
  2. By: Haas, Theodor Philipp
    Type: Article
    In: Journal of the New York Botanical Garden
    Volume: 42
    Issue: 497
    Date: 1941-05
    Page Range: 124--125
    Publication Info: Lancaster, Pa, Published for the Garden by the New Era Printing Co, 1900-