@misc{indiciae4666396e073e,
  title = {Combined description of map units and correlation of map units for the Petersburg-Wrangell area 1:63,360-scale geologic maps, southeastern Alaska},
  author = {D. A. Brew and D. J. Grybeck},
  year = {1997},
  doi = {10.3133/ofr97156o},
  url = {https://pubs.usgs.gov/publication/ofr97156O},
  note = {Source identifier: ofr97156O}
}