Danner, Wilber R. _Geology of Olympic National Park._ 68 pp. Univ. of
Washington Press. Seattle, 1955. Well illustrated booklet explaining
the complex geological history of the park in terms the untrained
geologist can understand.
Sharp, Robert P. _Glaciers._ 78 pp. Univ. of Oregon Press. 1960.
Excellent description of the complex structure and behavior of
glaciers. Provides information from current studies of Blue Glacier
on Mount Olympus.