TY  - RPRT
TI  - A plotting program for producing ashfall prediction maps from the output of the NOAA forecast trajectory program; application to and examples from the 1980 Mount St. Helens eruptions
AU  - William K. Smith
PY  - 1980
DO  - 10.3133/ofr802005
UR  - https://pubs.usgs.gov/publication/ofr802005
ID  - ofr802005
ER  -