@misc{indiciae2d7ef79d029b,
  title = {Radioactive isotopes.},
  author = {J W BETTMAN},
  year = {1958},
  doi = {10.1001/archopht.1958.00940070035003},
  url = {https://pubmed.ncbi.nlm.nih.gov/13532089/},
  note = {Source identifier: 13532089}
}