@misc{indiciae1bd3d0da6ac6,
  title = {Map showing copper determined by atomic absorption 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/ofr7873c},
  url = {https://pubs.usgs.gov/publication/ofr7873C},
  note = {Source identifier: ofr7873C}
}