@misc{1187021,
  author = {J W Cooper and A V Phelps and S J Smith},
  title = {The National Measurement System for the physical properties of atoms and molecules:},
  year = {1976},
  month = {1976-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.IR.75-944},
  language = {en},
}