@misc{1163561,
  author = {Jacqueline M Calhoun},
  title = {Radioactivity calibrations with the "4Ï€" Gamma ionization chamber and other radioactivity calibration capabilities:},
  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.SP.250-10},
  language = {en},
}