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Please read BHL's Acknowledgment of Harmful Content
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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