@misc{1300541,
  author = {David Bunk and David Newton},
  title = {Certification of Standard Reference Material 2921a},
  year = {2026},
  month = {2026-01-12 05:01:00},
  publisher = {Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=961020},
  doi = {https://doi.org/10.6028/NIST.SP.260-263},
  language = {en},
}