Mount St. Helens
Contributors: United States. Forest Service. Pacific Northwest Region
Publisher: Mount St. Helens Geological Area, Gifford Pinchot National Forest, U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Region
Published: 1980
Place of publication: Vancouver, Wash
Language: eng
Subjects: Volcanoes -- Washington (State) -- Saint Helens, Mount; Saint Helens, Mount (Wash.) -- Eruption, 1980