TY  - RPRT
TI  - Size and shape measurements of ash particles from the May 18, 1980, eruption of Mount St. Helens
AU  - Robert A. Zielinski
AU  - Michael B. Sawyer
PY  - 1980
DO  - 10.3133/ofr81114
UR  - https://pubs.usgs.gov/publication/ofr81114
ID  - ofr81114
ER  -