@misc{1163351,
  author = {T E Gills and R Mavrodineanu},
  title = {Standard Reference Materials ::Summary of gas cylinder and permeation tube standard reference materials issued by the National Bureau of Standards/},
  year = {1987},
  month = {1987-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.SP.260-108},
  language = {en},
}