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  1. By: Zon, Raphaël, - Sparhawk, William N. (William Norwood),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1928
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Zon, Raphaël,
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1914
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  3. By: Zon, Raphaël, - Briscoe, John M. (John Manvers),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, Forest Service, 1911
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  4. By: Zon, Raphaël, - Duerr, William A. (William Allen),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1942
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  5. By: Zon, Raphaël,
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, Forest Service, 1910
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  6. By: Zon, Raphaël,
    Publication info: Washington, Govt. Print. Off, 1910
    Holding Institution: University of California Libraries
  7. By: United States. Forest Service. - Zon, Raphaël,
    Publication info: Washington, Govt. print.off, 1927
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  8. By: Zon, Raphaël, - Graves, Henry S. (Henry Solon),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, Forest Service, 1911
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  9. By: Zon, Raphaël,
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, Forest Service, 1905
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  10. By: Zon, Raphaël, - United States. Forest Service.
    Publication info: Washington, D.C, G.P.O, 1907
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  11. By: Shantz, H. L. (Homer LeRoy), - Zon, Raphaël, - United States. Department of Agriculture.
    Publication info: Washington [D.C.], Govt. Print. Off, 1924
    Holding Institution: New York Botanical Garden, LuEsther T. Mertz Library
  12. By: Bates, Carlos G. (Carlos Glazier), - Zon, Raphaël,
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1922
    Holding Institution: Multiple institutions
  13. By: Zon, Raphaël,
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1915
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  14. By: Zon, Raphaël, - Greeley, William B. (William Buckhout),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1928
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library