@misc{indiciaee525498a767b,
  title = {Mercury in soil gas and air--A potential tool in mineral exploration},
  author = {Joseph Howard McCarthy and W.W. Vaughn and R. E. Learned and J. L. Meuschke},
  year = {1969},
  doi = {10.3133/cir609},
  url = {https://pubs.usgs.gov/publication/cir609},
  note = {Source identifier: cir609}
}