@misc{1154511,
  author = {Velma I Burns and Donald A McSparron},
  title = {Optical radiation measurements ::photometric calibration procedures},
  year = {1972},
  month = {1972-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.TN.594-3},
  language = {en},
}