@misc{indiciaeab04dfde4fd6,
  title = {An automatic x-ray-size limiting system.},
  author = {R Walchle and H Stewart and J G Terrill},
  year = {1967},
  url = {https://pubmed.ncbi.nlm.nih.gov/6071712/},
  note = {Source identifier: 6071712}
}