@misc{indiciaed2c70c3d169a,
  title = {Location of pingos and pingolike mounds observed from the ground, from aerial reconnaissance, and on aerial photographs in interior Alaska},
  author = {George William Holmes},
  year = {1967},
  doi = {10.3133/ofr67115},
  url = {https://pubs.usgs.gov/publication/ofr67115},
  note = {Source identifier: ofr67115}
}