1. Zürich Bulletin AB28.1. Zürich News item---Tenth anniversary colloquium 1968
2. {AB 31.1.1} News item---Minority report ALGOL Bulletin AB31.1.1 Mar. 1970.]] {AB 31.1.1} News item---Minority report ALGOL Bulletin AB31.1.1 Mar. 1970.]]
3. {AB 52.3.1} Survey of viable ALGOL 68 implementations ALGOL Bulletin AB52.3.1 Aug. 1988.]] {AB 52.3.1} Survey of viable ALGOL 68 implementations ALGOL Bulletin AB52.3.1 Aug. 1988.]]
4. {Baecker 1968} Baecker H. D. ASERC---a code for ALGOL 68 basic tokens ALGOL Bulletin AB28.3.5 Jul. 1968.]] {Baecker 1968} Baecker H. D. ASERC---a code for ALGOL 68 basic tokens ALGOL Bulletin AB28.3.5 Jul. 1968.]]
5. {Boom 1972} Boom H. J. IFIP WG 2.1 Working Paper 217 (Vienna 4) Sep. 1972.]] {Boom 1972} Boom H. J. IFIP WG 2.1 Working Paper 217 (Vienna 4) Sep. 1972.]]