Computer-aided design : proceedings of the IFIP Working Conference on Principles of Computer-Aided Design, Eindhoven, the Netherlands, October 16-18, 1972 / organized by IFIP Technical Committee 5, Computer Applications in Technology, International Federation for Information Processing; edited by J. Vlietstra and R.F. Wielinga. - Vlietstra, J. (Jakob), 1932-; Wielinga, Rÿnver Folkert (North-Holland Publishing Co., 1973)