@misc{indiciaebf1bcda60668,
  title = {Comparison of thicknes, grade, and depth of radioactive layers as determined by gamma-ray logging and by core sampling},
  author = {C. M. Bunker},
  year = {1960},
  doi = {10.3133/ofr6022},
  url = {https://pubs.usgs.gov/publication/ofr6022},
  note = {Source identifier: ofr6022}
}