@misc{indiciae515309cc7602,
  title = {Preliminary reconnaissance geologic map of the Petersburg and parts of the Port Alexander and Sumdum 1:250,000 quadrangles, southeastern Alaska},
  author = {David A. Brew and A.T. Ovenshine and Susan M. Karl and S. J. Hunt},
  year = {1984},
  doi = {10.3133/ofr84405},
  url = {https://pubs.usgs.gov/publication/ofr84405},
  note = {Source identifier: ofr84405}
}