@misc{indiciae6cf08e8eb6e2,
  title = {Relations of ammonium minerals at several hydrothermal systems in the western U.S.},
  author = {M. D. Krohn and C. Kendall and J.R. Evans and T. L. Fries},
  year = {1993},
  url = {https://pubs.usgs.gov/publication/70017337},
  note = {Source identifier: 70017337}
}