@misc{indiciae21ed4c0d94a3,
  title = {Map showing spectrographically determined nickel in stream sediments, Ketchikan and Prince Rupert quadrangles, Alaska},
  author = {Richard D. Koch and Raymond L. Elliott and M. J. Diggles},
  year = {1978},
  doi = {10.3133/ofr7873j},
  url = {https://pubs.usgs.gov/publication/ofr7873J},
  note = {Source identifier: ofr7873J}
}