@misc{indiciaec4b74a2e7a58,
  title = {Geologic map of the Gulkana A-2 quadrangle, Alaska},
  author = {Donald H. Richter},
  year = {1979},
  doi = {10.3133/gq1520},
  url = {https://pubs.usgs.gov/publication/gq1520},
  note = {Source identifier: gq1520}
}