TY  - RPRT
TI  - Physiographic diagrams of Mount St. Helens, Washington showing changes in its summit crater, 1981
AU  - T. R. Alpha
AU  - J. M. Morley
AU  - Bobbie Myers
AU  - Terry Leighley
PY  - 1982
DO  - 10.3133/mf1420
UR  - https://pubs.usgs.gov/publication/mf1420
ID  - mf1420
ER  -