Gerhard Goos Henry J. Bowlden Paul Branquart B. J. Mailloux J. E. L. Peck P. M. Woodward Panel Discussion - Algol 68 Sublanguages. 265-281, 289-300 1970 conf/algol/1970 ALGOL 68 Implementation db/conf/algol/algol1970.html#GoosBBMPW70