Communications of the ACM (CACM), Volume 4, 1961

Volume 4, Number 1, January 1961

Volume 4, Number 2, February 1961

Volume 4, Number 3, March 1961

Volume 4, Number 4, April 1961

Volume 4, Number 5, May 1961

Volume 4, Number 6, June 1961

Volume 4, Number 7, July 1961

Volume 4, Number 8, August 1961

Volume 4, Number 9, September 1961