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Outdoor recreation - Environmental aspects - United States.
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2 作品在 0 項出版品 0 種語言
書目資訊
NOLS soft paths : = how to enjoy the wilderness without harming it /
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(書目-語言資料,印刷品)
Outdoor recreation for 21st century America : = a report to the nation : the national survey on recreation and the environment /
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(書目-語言資料,印刷品)
主題
Public lands- Recreational use- United States.
Outdoor recreation- Environmental aspects- United States.
Outdoor recreation- Government policy- United States.
Outdoor recreation- Management.- United States
Environmental protection- United States.
Wilderness areas- Recreational use.- United States
Wilderness areas- Environmental aspects- United States.
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