@misc{indiciaec25ee63152ab,
  title = {Host rocks and their alterations as related to uranium-bearing veins in the United States},
  author = {George W. Walker},
  year = {1956},
  doi = {10.3133/tei638},
  url = {https://pubs.usgs.gov/publication/tei638},
  note = {Source identifier: tei638}
}