@misc{indiciaed857e35b7f55,
  title = {Grinnell and Sperry Glaciers, Glacier National Park, Montana: A record of vanishing ice},
  author = {Arthur Johnson},
  year = {1980},
  doi = {10.3133/pp1180},
  url = {https://pubs.usgs.gov/publication/pp1180},
  note = {Source identifier: pp1180}
}