TY  - RPRT
TI  - Photographic documentation of the evolution of Crater Glacier, Mount St. Helens, Washington, September 2006–November 2009
AU  - Joseph S. Walder
AU  - Steven P. Schilling
AU  - David R. Sherrod
AU  - James W. Vallance
PY  - 2010
DO  - 10.3133/ofr20101141
UR  - https://pubs.usgs.gov/publication/ofr20101141
ID  - ofr20101141
ER  -