@misc{1154546,
  author = {Jon Geist},
  title = {Optical radiation measurements ::fundamental principles of absolute radiometry and the philosophy of this NBS program (1968 to 1971) /.},
  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.594-1},
  language = {en},
}