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  1. By: Thomson, Robert Boyd, - Sifton, Harold Boyd
    Publication info: [Toronto], University of Toronto Press, 1922
    Holding Institution: Cornell University Library
  2. By: Thomson, Robert Boyd, - Sifton, Harold Boyd
    Publication info: Toronto, University of Toronto Press, 1922
    Holding Institution: University of Toronto - Robarts Library
  1. By: Sifton, Harold Boyd
    Type: Article
    In: American journal of botany
    Volume: 7
    Issue: 6
    Date: 1920-06
    Page Range: 243--251
    Publication Info: Lancaster, Pa, Published in cooperation with the Botanical Society of America by the Brooklyn Botanic Gardens, 1914-
  2. By: Sifton, Harold Boyd
    Type: Article
    In: Botanical gazette
    Volume: 60
    Issue: 5
    Date: 1915
    Page Range: 400--405
    Publication Info: Hanover, Ind, [publisher not identified], 1876-1991