@misc{1181991,
  author = {Ronald H McKnight and Robert E Hebner},
  title = {X-CAL - A calibration system for electrical measurement devices used with diagnostic x-ray units:},
  year = {1980},
  month = {1980-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.IR.80-2072},
  language = {en},
}