The 1980 eruptions of Mount St. Helens,Washington, Early results of studies of volcanic events in 1980, geophysical monitoring of activity, and studies of volcanic deposits, effects, and potential hazards.
Gott skick. Washington,1982,United States Government Printing Office, 844s + karta i ficka på bakre pärms insida, foto och illustrationer i sv/v och färg, dek.klb., ?,Andra upplagan.,Lättare slitage på pärmens hörn och kanter, ,Gott skick.,81600142,