@misc{1181161,
  author = {E E Hughes and J Mandel},
  title = {A procedure for establishing traceability of gas mixtures to certain National Institute of Standards and Technology SRM's:},
  year = {1989},
  month = {1989-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.IR.81-2227r1989},
  language = {en},
}