@misc{indiciae915ccef159e1,
  title = {Geologic map of Mackay 4 (Grouse) SE Quadrangle, Butte County, Idaho},
  author = {Betty Skipp and M. A. Kuntz and L. A. Morgan},
  year = {1989},
  doi = {10.3133/ofr89431},
  url = {https://pubs.usgs.gov/publication/ofr89431},
  note = {Source identifier: ofr89431}
}