@misc{indiciae3226b2312a79,
  title = {The Montana lobe of the Keewatin ice sheet},
  author = {F.H.H. Calhoun},
  year = {1906},
  doi = {10.3133/pp50},
  url = {https://pubs.usgs.gov/publication/pp50},
  note = {Source identifier: pp50}
}