@misc{indiciae3121d6090b56,
  title = {Shielding requirements for mammography.},
  author = {D J Simpkin},
  year = {1987},
  doi = {10.1097/00004032-198709000-00006},
  url = {https://pubmed.ncbi.nlm.nih.gov/3623916/},
  note = {Source identifier: 3623916}
}