@misc{indiciaee66a9ae5077a,
  title = {Photographic documentation of the evolution of Crater Glacier, Mount St. Helens, Washington, September 2006–November 2009},
  author = {Joseph S. Walder and Steven P. Schilling and David R. Sherrod and James W. Vallance},
  year = {2010},
  doi = {10.3133/ofr20101141},
  url = {https://pubs.usgs.gov/publication/ofr20101141},
  note = {Source identifier: ofr20101141}
}