^"The Evolution of the National Radio Astronomy Observatory into a User Based Observatory," by Kenneth I. Kellerman and E. Bouton; presented at the 2007 AAS/AAPT Joint meeting. نسخة محفوظة 10 يونيو 2019 على موقع واي باك مشين.
^American Men & Women of Science. 12th edition, Physical & Biological Sciences. New York: R.R. Bowker, 1971-1973.