The effect of ashfall from the May 18, 1980 eruption of Mount St. Helens on cryptogams
By: by Elaine Harris.
Published: 1984
Language: eng
Number of pages: 50
Subjects: Cryptogams.; Volcanic ash, tuff, etc. -- Washington (State); Saint Helens, Mount (Wash.) -- Eruption, 1980.
Notes: Typescript.

Thesis (M.S.)--Washington State University, 1984.

Bibliography: leaves 42-50.

WSU:"Department of Botany."