Spring, I., & Manning, H. (1974). Wilderness trails Northwest: A hiker's and climber's overview-guide to national parks and wilderness areas in Wyoming, Montana, Idaho, Northern California, Oregon, Washington, British Columbia, Canadian Rockies. Touchstone Press.
Chicago Style (17th ed.) CitationSpring, Ira, and Harvey Manning. Wilderness Trails Northwest: A Hiker's and Climber's Overview-guide to National Parks and Wilderness Areas in Wyoming, Montana, Idaho, Northern California, Oregon, Washington, British Columbia, Canadian Rockies. Beaverton, Or.: Touchstone Press, 1974.
MLA (8th ed.) CitationSpring, Ira, and Harvey Manning. Wilderness Trails Northwest: A Hiker's and Climber's Overview-guide to National Parks and Wilderness Areas in Wyoming, Montana, Idaho, Northern California, Oregon, Washington, British Columbia, Canadian Rockies. Touchstone Press, 1974.