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  1. By: United States. Agricultural Research Service. Forage and Range Research Branch.
    Publication info: Washington, D.C. :Agricultural Research Service, U.S. Dept. of Agriculture,1967.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: United States. Agricultural Research Service. Forage and Range Research Branch.
    Publication info: Beltsville,The Branch
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library