@misc{indiciae39cacdaecb3c,
  title = {An improved X-ray phototimer.},
  author = {P C HODGES and R T JENKINS and S F WILLIAMS},
  year = {1950},
  doi = {10.1148/54.1.64},
  url = {https://pubmed.ncbi.nlm.nih.gov/15409318/},
  note = {Source identifier: 15409318}
}