Citace podle APA (7th ed.)
ebrary, Inc. (1993). Protecting visibility in national parks and wilderness areas. National Academy Press.
Citace podle Chicago (17th ed.)
ebrary, Inc. Protecting Visibility in National Parks and Wilderness Areas. Washington, D.C.: National Academy Press, 1993.
Citace podle MLA (9th ed.)
ebrary, Inc. Protecting Visibility in National Parks and Wilderness Areas. National Academy Press, 1993.
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