@misc{indiciae21c4a3b7c087,
  title = {An improved glass sample holder for assaying low radioactivity samples},
  author = {Francis J. Flanagan and B.A. McCall},
  year = {1955},
  doi = {10.3133/tei568},
  url = {https://pubs.usgs.gov/publication/tei568},
  note = {Source identifier: tei568}
}