@misc{indiciae2270e516aae7,
  title = {Mercury and silver in soils over the eastern half of the Caribou stock, Boulder County, Colorado},
  author = {George Joseph Neuerburg},
  year = {1969},
  doi = {10.3133/ofr69182},
  url = {https://pubs.usgs.gov/publication/ofr69182},
  note = {Source identifier: ofr69182}
}