US Dept of Commerce National Bureau of Standards- The SRI Heirarchical Development Methodology (HDM) and its Application to the Development of Secure Software, 1980

US Dept of Commerce National Bureau of Standards- The SRI Heirarchical Development Methodology (HDM) and its Application to the Development of Secure Software, 1980, Box: 12, Folder: 15. Terry Benzel Papers, CBI 258. Charles Babbage Institute Archives. https://archives.lib.umn.edu/repositories/3/archival_objects/974586 Accessed April 20, 2024.