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  1. By: Calkins, Hugh G. - United States. Forest Service.
    Publication info: Albuquerque, N.M. :U.S. Dept.of Agriculture, Soil Conservation Service, Region Eight,[1937]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: United States. Soil Conservation Service. Region Eight. - Calkins, Hugh G. - United States. Soil Conservation Service. Region Eight.
    Publication info: Albuquerque, NM :The Service,1940.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  3. By: Calkins, Hugh G. - United States. Forest Service.
    Publication info: Albuquerque, N.M. :U.S. Dept.of Agriculture, Soil Conservation Service, Region Eight,[1937]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  4. By: Goodding, Leslie N. - Calkins, Hugh G. - United States. Soil Conservation Service. Region Eight.
    Publication info: Albuquerque, N.M. :United States. Soil Conservation Service, Region Eight,1940.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  5. By: Flory, Evan L. - Calkins, Hugh G. - Trussell, D. F. - United States. Soil Conservation Service. Region 8.
    Publication info: Albuquerque, NM :United States. Soil Conservation Service. Region 8,1938.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  6. By: Calkins, Hugh G. - United States. Soil Conservation Service. Region Eight. Forestry Division.
    Publication info: Albuquerque, NM :U. S. Dept. of Agriculture, Soil Conservation Service, Region Eight,1938.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  7. By: Calkins, Hugh G. - United States. Soil Conservation Service.
    Publication info: Albuquerque, N.M. :U.S. Dept.of Agriculture, Soil Conservation Service, Region Eight,[1937]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library