@misc{indiciae143b2c1a5429,
  title = {A comparison of stationary and continuous gamma-ray spectral data with cores in granites},
  author = {Ulrich Schimschal},
  year = {1991},
  doi = {10.3133/ofr91101},
  url = {https://pubs.usgs.gov/publication/ofr91101},
  note = {Source identifier: ofr91101}
}