@misc{indiciae116c33856f7f,
  title = {An optical shutter for scintilation meters.},
  author = {J F DEALLER},
  year = {1954},
  doi = {10.1259/0007-1285-27-323-646},
  url = {https://pubmed.ncbi.nlm.nih.gov/13209020/},
  note = {Source identifier: 13209020}
}