@misc{1174786,
  author = {M J Berger and J H Hubbell},
  title = {XCOM ::photon cross sections on a personal computer},
  year = {1987},
  month = {1987-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.IR.87-3597},
  language = {en},
}