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  1. By: Steinberg, R A
    Type: Article
    In: American journal of botany
    Volume: 6
    Issue: 8
    Date: 1919-10
    Page Range: 330--356
    Publication Info: Lancaster, Pa, Published in cooperation with the Botanical Society of America by the Brooklyn Botanic Gardens, 1914-
  2. By: Steinberg, R A
    Type: Article
    In: American journal of botany
    Volume: 6
    Issue: 9
    Date: 1919-11
    Page Range: 357--372
    Publication Info: Lancaster, Pa, Published in cooperation with the Botanical Society of America by the Brooklyn Botanic Gardens, 1914-
  3. By: Steinberg, R A
    Type: Article
    In: Memoirs of the Torrey Botanical Club
    Volume: 17
    Issue: 2
    Date: 1918
    Page Range: 287--293
    Publication Info: Durham, N.C, Published for the Club by the Seeman Printery, 1889-