TY  - RPRT
TI  - Mount St. Helens volcanic-ash fall in the Bull Run watershed, Oregon, March-June 1980
AU  - M.V. Shulters
AU  - Daphne G. Clifton
PY  - 1980
DO  - 10.3133/cir850a
UR  - https://pubs.usgs.gov/publication/cir850A
ID  - cir850A
ER  -