@misc{indiciae54f06c0b99c2,
  title = {Changing times.},
  author = {C M GRAY},
  year = {1963},
  doi = {10.1148/80.3.492},
  url = {https://pubmed.ncbi.nlm.nih.gov/13949969/},
  note = {Source identifier: 13949969}
}