Chemistry of ash and leachates from the May 18, 1980 eruption of Mount St. Helens, Washington /
Hinkley, Todd K.
Smith, Kathleen S.
Washington : Government Printing Office,
1987.
Chemical and mineralogic aspects of observed fractionation of ash from the May 18, 1980 eruption of Mount St. Helens / by Todd K. Hinkley ... [et. al.]. -- Leachate chemistry of ash from the May 18, 1980 eruption at Mount St. Helens / by Todd K. Hinkley and Kathleen S. Smith.
Volcanic ash, tuff, etc.