@misc{indiciae77e9790e606a,
  title = {A multiple-diaphragm system for a cesium 137 unit.},
  author = {R S LANDAUER},
  year = {1962},
  doi = {10.1148/78.2.256},
  url = {https://pubmed.ncbi.nlm.nih.gov/14461953/},
  note = {Source identifier: 14461953}
}