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  1. By: Colorado Agricultural Experiment Station - Colorado Agricultural Experiment Station.
    Publication info: Fort Collins, Colorado State University Experiment Station, 1887-1984
    Holding Institution: University Library, University of Illinois Urbana Champaign
  2. By: Hunter, Elmer C. (Elmer Carroll), - United States. Agricultural Research Service. - Colorado Agricultural Experiment Station.
    Publication info: Washington, D.C, Agricultural Research Service, U.S. Department of Agriculture, 1959
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  3. By: Siegler, E. H. (Edouard Horace), - Plank, H. K. (Harold Kaufman), - Colorado Agricultural Experiment Station.
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1921
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  4. By: Siegler, E. H. (Edouard Horace), - Plank, H. K. (Harold Kaufman), - Colorado Agricultural Experiment Station.
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1921
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  5. By: May, William Lewis - Colorado Agricultural Experiment Station.
    Publication info: Fort Collins, Colo, Agricultural Experiment Station of the Agricultural College of Colorado, 1920
    Holding Institution: University Library, University of Illinois Urbana Champaign