@misc{indiciae5d9635f97bea,
  title = {Reconnaissance geologic map of the Nabesna A-4 quadrangle, Alaska},
  author = {D.H. Richter},
  year = {1972},
  doi = {10.3133/ofr72313},
  url = {https://pubs.usgs.gov/publication/ofr72313},
  note = {Source identifier: ofr72313}
}