@misc{29061,
  author = {William Barker},
  title = {Guidelines for Identifying an Information System as a National Security System},
  year = {2003},
  month = {2003-08-20},
  publisher = {Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=151282},
  language = {en},
}