- IFIP Congress (2). 1968.
- A. J. H. Morrel, editor, Information Processing, Proceedings of IFIP Congress 1968, Edinburgh, UK, 5-10 August 1968, Volume 2 - Hardware, Applications. 1968.
- A. J. H. Morrel, editor, Information Processing, Proceedings of IFIP Congress 1968, Edinburgh, UK, 5-10 August 1968, Volume 1 - Mathematics, Software. 1968.
- IFIP Congress (1). 1968.