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  1. 1
    Noise levels for aircraft used for commercial operations in Grand Canyon National Park special flight rules area.
    Published 2006
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  2. 2
    Issues regarding the new NPS methodology used to evaluate the achievement of natural quiet restoration standards in Grand Canyon National Park : oversight hearing before the Subcommittee on National Parks and Public Lands of the Committee on Resources, House of Representatives, One Hundred Sixth Congress, first session, May 25, 1999, Washington, DC.
    Published 2000
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  3. 3
    The Grand Canyon National Park : oversight hearing before the Subcommittee on National Parks and Public Lands of the Committee on Resources, House of Representatives, One Hundred Fifth Congress, second session ... September 24, 1998, Washington, DC.
    Published 1998
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  4. 4
    Oversight of Grand Canyon overflights : hearing before the Subcommittee on Aviation of the Committee on Commerce, Science, and Transportation, United States Senate, One Hundred Second Congress, second session, July 7, 1992.
    Published 1993
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  5. 5
    Grand Canyon overflights (Tempe, Arizona) : hearing before the Subcommittee on Aviation of the Committee on Commerce, Science, and Transportation, United States Senate, One Hundred Fourth Congress, second session, October 11, 1996.
    Published 1997
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  6. 6
    Grand Canyon overflights (Las Vegas, Nevada) : hearing before the Subcommittee on Aviation of the Committee on Commerce, Science, and Transportation, United States Senate, One Hundred Fourth Congress, second session, October 10, 1996.
    Published 1997
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  7. 7
    The Grand Canyon National Park : oversight hearing before the Subcommittee on National Parks and Public Lands of the Committee on Resources, House of Representatives, One Hundred Fifth Congress, second session ... September 24, 1998, Washington, DC.
    Published 1998
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    Government Document eBook
  8. 8
    Issues regarding the new NPS methodology used to evaluate the achievement of natural quiet restoration standards in Grand Canyon National Park : oversight hearing before the Subcommittee on National Parks and Public Lands of the Committee on Resources, House of Representatives, One Hundred Sixth Congress, first session, May 25, 1999, Washington, DC.
    Published 2000
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    Government Document eBook
  9. 9
    Casa Grande Ruins National Monument : acoustical monitoring 2010 /
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  10. 10
    Coronado National Memorial : acoustical monitoring 2010 /
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  11. 11
    Fort Bowie National Historic Site : acoustical monitoring 2010 /
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  12. 12
    Tumacácori National Historical Park : acoustical monitoring 2010 /
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  13. 13
    Montezuma Castle National Monument : acoustical monitoring 2010 and 2012 /
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  14. 14
    Tuzigoot National Monument : acoustical monitoring 2010 and 2012 /
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