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  1. By: Vasey, George, - Richardson, Clifford, - United States. Division of Botany.
    Edition: A new, rev. and enl. ed.
    Publication info: Washington, Govt. print. off, 1889
    Holding Institution: Multiple institutions
  2. By: Vasey, George, - Richardson, Clifford,
    Edition: New, rev [and] enl. ed.
    Publication info: Washington, Govt. Print. Off, 1889
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  3. By: Vasey, George, - Richardson, Clifford, - United States. Division of Botany. - United States. Department of Agriculture.
    Publication info: Washington, D.C, G.P.O, 1884
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  4. By: Vasey, George, - Richardson, Clifford, - United States. Division of Botany.
    Publication info: Washington, Govt. print. off, 1884
    Holding Institution: Library of Congress
  5. By: Richardson, Clifford,
    Publication info: Washington, Govt. print. off, 1884
    Holding Institution: University of California Libraries (archive.org)
  6. By: Richardson, Clifford,
    Publication info: Washington, Govt. print. off, 1887
    Holding Institution: University of California Libraries (archive.org)
  7. By: Richardson, Clifford,
    Publication info: Washington, Govt. print. off, 1886
    Holding Institution: University of California Libraries (archive.org)