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  1. A botanical exploration of the north shore of the gulf of St. Lawrence including an annotated list of the species of vascular plants,
    By: St. John, Harold.
    Publication info: Ottawa,F. A. Acland, printer,1922.
    Contributed by: Harold B. Lee Library (archive.org)
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  2. Nomenclature of plants; a text for the application by the case method of the International code of botanical nomenclature.
    By: St. John, Harold.
    Publication info: New York,Ronald Press Co.[1958]
    Contributed by: MBLWHOI Library
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  3. Sable Island, with a catalogue of its vascular plants / by Harold St. John.
    By: St. John, Harold.
    Publication info: Boston :Gray Herbarium of Harvard University,1921.
    Contributed by: University of California Libraries (archive.org)
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  1. The crinite headed Hieraciums of the northwest
    By: St. John, Harold. - Warren, F A
    Type: Article
    In: Proceedings of The Biological Society of Washington
    Volume: 41
    Date: 1928
    Page Range: 107--109
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  2. Endemism in the Hawaiian flora, and a revision of the Hawaiian species of Gennera (Haloragidaceae). Hawaiian Plant Studies 11
    By: St. John, Harold.
    Type: Article
    In: Proceedings of the California Academy of Sciences
    Volume: 25
    Series: 4
    Date: 1946
    Page Range: 377--420
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  3. More variants of Scaevola taccada (Goodeniaceae) Hawaiian plant studies 43
    By: St. John, Harold.
    Type: Article
    In: Proceedings of The Biological Society of Washington
    Volume: 88
    Date: 1975
    Page Range: 73--75
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  4. Nomenclatorial changes in Glossopetalon (Celastraceae)
    By: St. John, Harold.
    Type: Article
    In: Proceedings of The Biological Society of Washington
    Volume: 55
    Date: 1942
    Page Range: 109--112
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  5. A revision of the loco-weeds of Washington
    By: St. John, Harold.
    Type: Article
    In: Proceedings of The Biological Society of Washington
    Volume: 41
    Date: 1928
    Page Range: 97--106
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  6. The Washington species of Draba
    By: Payson, E B - St. John, Harold.
    Type: Article
    In: Proceedings of The Biological Society of Washington
    Volume: 43
    Date: 1930
    Page Range: 97--122
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