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  1. History, progeny, and locations of crabapples of documented authentic origin /
    By: Jefferson, Roland M. - United States.
    Publication info: Washington, D.C. :Agricultural Research Service, U.S. Dept. of Agriculture,1970.
    Contributed by: U.S. Department of Agriculture, National Agricultural Library
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  2. History, progeny, and locations of crabapples of documented authentic origin /
    By: Jefferson, Roland M. - United States.
    Publication info: Washington :Agricultural Research Service, U. S. Dept. of Agriculture,1970.
    Contributed by: Smithsonian Libraries
    BHL Collections: Smithsonian Libraries
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  3. The Japanese flowering cherry trees of Washington, D.C. : a living symbol of friendship /
    By: Jefferson, Roland M. - Fusonie, Alan M. - United States.
    Publication info: Washington :Dept. of Agriculture, Agricultural Research Service,1977.
    Contributed by: Smithsonian Libraries
    BHL Collections: Smithsonian Libraries
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  4. The nomenclature of cultivated Japanese flowing cherries (Prunus) : the Sato-zakura group /
    By: Jefferson, Roland M. - Wain, Kay Kazue.
    Publication info: [Washington, D.C.] :U.S. Dept. of Agriculture, Agricultural Research Service,1984.
    Contributed by: Smithsonian Libraries
    BHL Collections: Smithsonian Libraries
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