@misc{indiciaec337860f5e78,
  title = {A portable low-energy photon calibration source.},
  author = {J V Boggs},
  year = {1971},
  doi = {10.1097/00004032-197111000-00002},
  url = {https://pubmed.ncbi.nlm.nih.gov/5112176/},
  note = {Source identifier: 5112176}
}