@misc{indiciae20d7ecbed471,
  title = {Glacier observations, Glacier National Park, Montana, 1966-1967},
  author = {Arthur Johnson},
  year = {1968},
  doi = {10.3133/ofr68147},
  url = {https://pubs.usgs.gov/publication/ofr68147},
  note = {Source identifier: ofr68147}
}