Guide Book
Kirk, Ruth. Exploring the Olympic Peninsula. 128 pp. Univ. of Washington Press, Seattle, 1964. Guide to the human and natural history of the Olympic Peninsula, including Olympic National Park. With maps and illustrations.
Leissler, Frederick. Roads and Trails of Olympic National Park. 84 pp. Univ. of Washington Press. Seattle, 1957. Guide with maps; very helpful for hikers. Written by former park ranger.