Road Guide to Mount St. Helens (Updated Edition)
Robert Decker was Professor of Geophysics at Dartmouth College for 25 years; he was also Scientist-in-Charge of the U.S. Geological Survey's Hawaiian Volcano Observatory for 5 years. Barbara Decker is a science writer who has written 15 books and many magazine articles. Barbara is the President of Double Decker Press established in 1984 to publish Road Guides to National Parks and Monuments.