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  1. By: Slocum, George K. - Ross, Charles R. (Charles Robert), - North Carolina. Dept. of Conservation and Development. - North Carolina State College. - American Forestry Association.
    Publication info: [Raleigh, N.C., : Division of Forestry and Parks[1945?]
    Holding Institution: State Library of North Carolina (archive.org)
  2. By: Lawson, F. R. - United States. Agricultural Research Service. - North Carolina State College. - North Carolina. Department of Agriculture.
    Publication info: Beltsville, Md. :U.S. Dept. of Agriculture, Agricultural Research Service,1963.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library