@misc{indiciae4b78a3c2e6ac,
  title = {Introduction to Geology and resources of gold, and geochemistry of gold},
  author = {Daniel R. Shawe and Samuel B. Romberger},
  year = {1988},
  doi = {10.3133/b1857a},
  url = {https://pubs.usgs.gov/publication/b1857A},
  note = {Source identifier: b1857A}
}