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  1. By: United States. National Park Service. - Yosemite Natural History Association. - Yosemite Naturalist Department. - Yosemite Naturalist Division.
    Publication info: [Yosemite National Park, Calif, Yosemite Natural History Association,
    Holding Institution: Prelinger Library
    Subjects: California  History  Interpretive programs  National parks and reserves  Natural history  Periodicals  Yosemite National Park  Yosemite National Park (Calif.)  
  2. By: Wagar, J. Alan. - Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
    Publication info: Portland, Or, Pacific Northwest Forest and Range Experiment Station, U.S. Dept. of Agriculture, Forest Service, 1972
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Aids and devices  Information display systems  Interpretive programs  National parks and reserves  Teaching  United States