@misc{indiciae06d563f676d9,
  title = {Evaluation of Potash Grade with Gamma-ray Logs},
  author = {Philip H. Nelson},
  year = {2007},
  doi = {10.3133/ofr20071292},
  url = {https://pubs.usgs.gov/publication/ofr20071292},
  note = {Source identifier: ofr20071292}
}