National park system : hearing before the Subcommittee on Public Lands, Reserved Water, and Resource Conservation of the Committee on Energy and Natural Resources, United States Senate, Ninety ninth Congress, first session, on the presentation of the Conservation Foundation's report, "National Parks for a new generation," presentation of the National Parks Service Director Mott's 12 points for guiding the national parks, and other park related issues, July 18, 1985.

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