@misc{indiciae33ea1b45baff,
  title = {Major-element chemistry, radiometric ages, and locations of samples from the Petersburg and parts of the Port Alexander and Sumdum quadrangles, southeastern Alaska},
  author = {S. L. Douglass and J.H. Webster and P.D. Burrell and M. A. Lanphere and D. A. Brew},
  year = {1989},
  doi = {10.3133/ofr89527},
  url = {https://pubs.usgs.gov/publication/ofr89527},
  note = {Source identifier: ofr89527}
}