@misc{indiciae27943be68a4c,
  title = {Geologic environment map of alumina resources of the Columbia Basin},
  author = {I. G. Sohn},
  year = {1952},
  doi = {10.3133/mr1},
  url = {https://pubs.usgs.gov/publication/mr1},
  note = {Source identifier: mr1}
}