@misc{indiciae88be46e46ebe,
  title = {Mineral-resource map of the Petersburg quadrangle and parts of the Port Alexander, Sitka, and Sumdum quadrangles, southeastern Alaska},
  author = {D. A. Brew and D. J. Grybeck and J. B. Cathrall and Susan M. Karl and R.B. Koch and D.F. Barnes and R.J. Newberry and Andrew Griscom and H. C. Berg},
  year = {1989},
  doi = {10.3133/mf1970b},
  url = {https://pubs.usgs.gov/publication/mf1970B},
  note = {Source identifier: mf1970B}
}