Barr, A. J. "The distribution and maintenance of SAS" pp215-220

Computer Science and Statistics: Tenth Annual Symp (1978) Computer Science and Statistics: Tenth Annual Symposium on the Interface, pp. 265-70. Edited by D. Hogben and D. W. Fife. (National Bureau of Standards Special Publication 503.) Washington, DC: National Bureau of Standards; 1978  

Languages mentioned SAS {1971} Statistical Analysis System