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  1. Absorption and excretion of salts by roots, as influenced by concentration and composition of culture solutions. I, Concentration relations of dilute solutions of calcium and magnesium nitrates to pea roots / by Rodney H. True and Harley Harris Bartlett.
    By: True, Rodney H. (Rodney Howard), - Bartlett, Harley Harris, - United States. Bureau of Plant Industry.
    Publication info: Washington, D.C. :Government Printing Office,1912.
    Contributed by: U.S. Department of Agriculture, National Agricultural Library
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  2. The Asa Gray bulletin.
    By: Bartlett, Harley Harris, - McVaugh, Rogers, - Gray Memorial Botanical Association. - Michigan Botanical Club. - University of Michigan. Botanical Gardens Association.
    Publication info: Ann Arbor, Mich.
    Contributed by: Missouri Botanical Garden, Peter H. Raven Library
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