@misc{indiciae69ce04e9e89b,
  title = {Map showing selected geologic features, Norton Sound, Alaska, 1981},
  author = {David A. Steffy and Lynn D. Lybeck},
  year = {1981},
  doi = {10.3133/ofr81721},
  url = {https://pubs.usgs.gov/publication/ofr81721},
  note = {Source identifier: ofr81721}
}