@misc{indiciae9f91e9d74e25,
  title = {U.S. Geological Survey uranium and thorium research assessment and exploration research program},
  author = {Terry W. Offield},
  year = {1980},
  doi = {10.3133/ofr80777},
  url = {https://pubs.usgs.gov/publication/ofr80777},
  note = {Source identifier: ofr80777}
}