@misc{indiciaecba6c321d414,
  title = {Near infrared detection of ammonium minerals},
  author = {M. D. Krohn and S. P. Altaner},
  year = {1987},
  doi = {10.1190/1.1442362},
  url = {https://pubs.usgs.gov/publication/70014849},
  note = {Source identifier: 70014849}
}