National Park Service (United States) & National Park Service (United States). (1997). VERP: The Visitor Experience and Resource Protection (VERP) Framework. National Park Service (United States).
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Chicago Style (17th ed.) Citation
National Park Service (United States) and National Park Service (United States). VERP: The Visitor Experience and Resource Protection (VERP) Framework. National Park Service (United States), 1997.
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MLA (9th ed.) Citation
National Park Service (United States) and National Park Service (United States). VERP: The Visitor Experience and Resource Protection (VERP) Framework. National Park Service (United States), 1997.
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Warning: These citations may not always be 100% accurate.