@misc{indiciae7e52f727fd8e,
  title = {Preliminary geologic map of southeastern Alaska},
  author = {H. M. Beikman},
  year = {1975},
  doi = {10.3133/mf673},
  url = {https://pubs.usgs.gov/publication/mf673},
  note = {Source identifier: mf673}
}