@misc{indiciaeb343bd4abc54,
  title = {Geologic map and distribution of heavy minerals in Tertiary and uppermost Cretaceous rocks of the Douglas 30' x 60' Quadrangle, Converse and Platte counties, Wyoming},
  author = {N.M. Denson and D. L. Macke and Christine Wheeler},
  year = {1990},
  doi = {10.3133/i2027},
  url = {https://pubs.usgs.gov/publication/i2027},
  note = {Source identifier: i2027}
}