@misc{indiciaec356419f08ee,
  title = {Alkalic rocks of Iron Hill, Gunnison County, Colorado},
  author = {E. S. Larsen},
  year = {1942},
  doi = {10.3133/pp197a},
  url = {https://pubs.usgs.gov/publication/pp197A},
  note = {Source identifier: pp197A}
}