1. The importance of volatile constituents;Burnham,1979
2. Sur les gaz volcaniques de Vulcano (Iles Eoliennes);Chaigneau;C.R. Acad. Sci. Paris,1970
3. Chronology of the 1980 eruptive activity;Christiansen,1981
4. Statistics and Data Analysis in Geology;Davis,1973
5. The Eruptions of Mount St. Helens;Decker;Sci. Am.,1981