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National Park Service's new area study program hearing before the Subcommittee on National Parks and Insular Affairs of the Committee on Interior and Insular Affairs, House of Representatives, Ninety-sixth Congress, first session ... hearing held in Washington, D.C., December 7, 1979
- "National Park Service's new area study program hearing before the Subcommittee on National Parks and Insular Affairs of the Committee on Interior and Insular Affairs, House of Representatives, Ninety-sixth Congress, first session ... hearing held in Washington, D.C., December 7, 1979"@en
- "National Park Service's new area study program : hearing before the Subcommittee on National Parks and Insular Affairs of the Committee on Interior and Insular Affairs, House of Representatives, Ninety-sixth Congress, first session ... held in Washington, D.C., December 7, 1979"
- "National Park Service's new area study program : hearing before the Subcommittee on National Parks and Insular Affairs of the Committee on Interior and Insular Affairs, House of Representatives, Ninety-sixth Congress, first session ... hearing held in Washington, D.C., December 7, 1979"@en