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  1. By: Merz, Albert R. (Albert Ronald), - Ross, William Horace,
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1924
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Ross, William Horace,
    Publication info: [Washington, Govt. print. off.], 1912
    Holding Institution: University of California Libraries
  3. By: Merz, Albert R. (Albert Ronald), - Ross, William Horace,
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1924
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  4. By: Ross, William Horace, - Merz, Albert R. (Albert Ronald), - Wagner, Cary Richard,
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1917
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  5. By: Ross, William Horace,
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1914
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library