Science News. Retrieved 23 March 2018. ↑ NASA Historical Databook, 1958–1968, Volume I, NASA Resources, NASA SP-4012v1, 1976, Page 10, https://history.nasa.gov/SP-4012v1.pdf ↑ For general discussion on Years 1960–1968, see Chapter 3 of NASA Historical Databook, 1958–1968, Volume I, NASA Resources, NASA SP-4012v1, 1976 ↑ SP-4012 NASA HISTORICAL DATA BOOK: VOLUME IV, NASA RESOURCES 1969–1978, Table 3-1 (Titled: Civilian and Military In-house Personnel (at end of fiscal year)), Link: https://history.nasa.gov/SP-4012/vol4/t3.1.htm ↑ NASA Historical Data Books (SP-4012), Volume VI: NASA Space Applications, Aeronautics and Space Research and Technology, Tracking and Data Acquisition/Support Operations, Commercial Programs, and Resources, 1979–1988, Compiled by Judy A. Rumerman, 1999, Reference: Chapter 7: NASA Personnel, Table 7-1 (Titled: Total NASA Workforce (at end of fiscal year), Page 468 Link: https://history.nasa.gov/SP-4012/vol6/cover6.html ↑ http://www.gao.gov/assets/230/223061.pdf ↑ "NASA Personnel: Challenges to Achieving Workforce Reductions". ↑ "Employee Orientation". employeeorientation.nasa.gov. ↑ Roger H. Bezdek & Robert M. Wendling (January 9, 1992).