@misc{indiciae46b178cacec7,
  title = {Design and construction of a gamma-ray spectrometer system for determining natural radioelement concentrations in geological samples at the U.S. Geological Survey in Reston, Virginia},
  author = {Stephen L. Snyder and Joseph S. Duval},
  year = {2003},
  doi = {10.3133/ofr0329},
  url = {https://pubs.usgs.gov/publication/ofr0329},
  note = {Source identifier: ofr0329}
}