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  1. By: Rocky Mountain Forest and Range Experiment Station (Fort Collins, Colo.)
    Publication info: Fort Collins, Colo, U.S. Dept. of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station, 1989
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Economic aspects  Forests and forestry  Mineral resources conservation  Mines and mineral resources  United States  
  2. By: United States. Forest Service. - United States. Forest service. Resources Program and Assessment Staff.
    Publication info: [Washington, D.C.?], U.S. Dept. of Agriculture, Forest Service, [1989?]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Economic aspects  Forests and forestry  Mineral resources conservation  Mines and mineral resources  United States  
  3. By: San Diego County (Calif.). Integrated Planning Office. - San Diego County (Calif.). Citizens' Committee on the General Plan. Conservation Element Subcommittee.
    Publication info: San Diego, CA, The County, December 19, 1979
    Holding Institution: Unknown
    Subjects: California  Cultural property  Environmental policy  Habitat conservation  Light pollution  Mineral resources conservation  Nature conservation  Planning  Plant conservation  Prevention  Protection  Regional planning  San Diego County  Soil conservation  Water conservation  Wildlife conservation