@misc{811401,
  author = {N. Heckert and Laura Mundy and Paul Stutzman},
  title = {Certification of Standard Reference Material® 2686b Portland Cement Clinker},
  year = {2021},
  month = {2021-04-12 04:04:00},
  publisher = {Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=930448},
  doi = {https://doi.org/10.6028/NIST.SP.260-204},
  language = {en},
}