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The national parks will they survive for future generations? : hearing before the Subcommittee on Criminal Justice, Drug Policy, and Human Resources of the Committee on Government Reform, House of Representatives, One Hundred Ninth Congress, first session, April 22, 2005
- "The national parks will they survive for future generations? : hearing before the Subcommittee on Criminal Justice, Drug Policy, and Human Resources of the Committee on Government Reform, House of Representatives, One Hundred Ninth Congress, first session, April 22, 2005"@en
- "The national parks : will they survive for future generations? : hearing before the Subcommittee on Criminal Justice, Drug Policy, and Human Resources of the Committee on Government Reform, House of Representatives, One Hundred Ninth Congress, first session, April 22, 2005"@en