@misc{indiciae8ddc70954362,
  title = {Use of NaI (Tl) and germanium detectors for in situ x-ray spectral monitoring of boreholes at nuclear waste-disposal sites},
  author = {W.S. Keys and F. E. Senftle and Allan B. Tanner},
  year = {1979},
  doi = {10.3133/ofr791220},
  url = {https://pubs.usgs.gov/publication/ofr791220},
  note = {Source identifier: ofr791220}
}