@misc{1187011,
  author = {Randall S Caswell},
  title = {The National Measurement System for ionizing radiations:},
  year = {1978},
  month = {1978-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.IR.75-946},
  language = {en},
}