@misc{indiciae648740f39bec,
  title = {Preliminary geologic map of central Alaska},
  author = {G. Donald Eberlein and J. S. Gassaway and Helen M. Beikman},
  year = {1977},
  doi = {10.3133/ofr77168a},
  url = {https://pubs.usgs.gov/publication/ofr77168A},
  note = {Source identifier: ofr77168A}
}