@misc{indiciaeeda513caab81,
  title = {Geologic map of the northeast quarter of the Bullfrog 15-minute Quadrangle, Nye County, Nevada},
  author = {Florian Maldonado and B.P. Hausback},
  year = {1990},
  doi = {10.3133/i2049},
  url = {https://pubs.usgs.gov/publication/i2049},
  note = {Source identifier: i2049}
}