• 3 Journals, Magazines, Newspapers

• 2 Recreation
• 1 Design (Washington, D.C.)
• 1 Grist (Washington, D.C.)
• 1 Management
• 1 Park Practice Program (U.S.)
• 1 Periodicals
• 1 Recreation areas
• 1 Trends (Washington, D.C.)

• 2 National Conference on State Parks
• 2 National Recreation and Park Association
• 2 United States. National Park Service
• 1 National Society for Park Resources (U.S.)
• 1 United States. Heritage Conservation and Recreation Service

• 3 United States
• 1 États-Unis

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