Mansbach, P.
and Shneier, M.
(1988),
Gramps Operating System: User, NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=820232
(Accessed October 7, 2024)