1.

図書
図書
1. The National Park Story in Pictures
Isabelle F. Story
出版情報: Washington, D.C. : United States Department of the Interior : National Park Service, 1957
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2.

図書
図書
2. Winning support for parks and recreation
National Park Service, Park and Recreation Technical Service Division, Western Regional Office
出版情報: State College, PA : Venture Publishing, Inc., [1983]
シリーズ名: New directions in leisure
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3.

図書
図書
3. Marketing, parks and recreation
National Park Service, Park and Recreation Technical Service Division, Western Regional Office
出版情報: State College, PA : Venture Publishing, Inc., [198-]
シリーズ名: New directions in leisure
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