First International Symposium on Volcanic Ash and Aviation Safety : program and abstracts, Seattle, Washington, July 8-12, 1991 /
Casadevall, Thomas J.
Geological Survey (U.S.)
International Symposium on Volcanic Ash and Aviation Safety(1st. :1991 :Seattle, Washington)
[Washington] : US Government Printing Office,
1991.
Volcanic hazard assessment