@misc{1191656,
  author = {Deane B Judd},
  title = {Circular of the Bureau of Standards no. 478::colorimetry},
  year = {1950},
  month = {1950-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.CIRC.478},
  language = {en},
}