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  1. John Thomas Howell botanical collecting notebook,
    By: Howell, John Thomas, - California Academy of Sciences.
    Contributed by: California Academy of Sciences Library
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  2. Leaflets of western botany.
    By: Eastwood, Alice, - Howell, John Thomas,
    Publication info: San Fransisco:[J. T. Howell],1932-1966.
    Contributed by: Mertz Library, The New York Botanical Garden
    BHL Collections: New York Botanical Garden
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