@misc{indiciae227a75a5c048,
  title = {Reconnaissance geologic map of the Petersburg B-3 quadrangle, southeastern Alaska},
  author = {David A. Brew},
  year = {1997},
  doi = {10.3133/ofr97156e},
  url = {https://pubs.usgs.gov/publication/ofr97156E},
  note = {Source identifier: ofr97156E}
}