@misc{indiciae83eec66b1b9e,
  title = {Surficial geologic map of Glacier National Park, Montana},
  author = {P. E. Carrara},
  year = {1990},
  doi = {10.3133/i1508d},
  url = {https://pubs.usgs.gov/publication/i1508D},
  note = {Source identifier: i1508D}
}