@misc{indiciaea6f204c0211e,
  title = {The use of plants in prospecting for precious metals, principally gold; a selected bibliography and topic index},
  author = {J. A. Erdman and J. C. Olson},
  year = {1985},
  doi = {10.3133/ofr85118},
  url = {https://pubs.usgs.gov/publication/ofr85118},
  note = {Source identifier: ofr85118}
}