Issue No.12 - December (1978 vol.11)
N. Rochester , IBM Corporation and MIT
A keyboard prototype offers one-handed operation, small size, low cost of manufacture, and permits the touch typing of large alphabets.
N. Rochester, F.C. Bequaert, E.M. Sharp, "The Chord Keyboard", Computer, vol.11, no. 12, pp. 57-63, December 1978, doi:10.1109/C-M.1978.218024