"A Time-Sharing Debugging System for a Small Computer", by J. McCarthy (Stanford), S. Boilen (Bolt Beranek and Newman), E. Fredkin (Information International Inc.), and J. C. R. Licklider (ARPA), Proceedings of the Spring Joint Computer Conference, 1963, page 56 [1]
BBN's formal acceptance of the first PDP-1 was reported in Computers and Automation, April 1961, page 8B. [2]
"An Interview with John McCarthy," 2 March 1989, oral history conducted by William Aspray,
transcript OH 156, Charles Babbage Institute, University of Minnesota, p. 5.[3]
