@misc{indiciae86248e584cce,
  title = {The assessment of metallic mineral resources in Alaska},
  author = {D.A. Singer and A.T. Ovenshine},
  year = {1979},
  doi = {10.3133/ofr781a},
  url = {https://pubs.usgs.gov/publication/ofr781A},
  note = {Source identifier: ofr781A}
}