(1989)International conference on devlopemnts in power system protection International conference on devlopemnts in power system protection (1975)International Conference on Developments in power System Protection International conference on Developments in power system protection International Conference on Developments in power System Protection (Cardiff)International Conference on Developments in Bridge Design and Construction (1982)International conference on pattern recognition (1982)International Conference on pattern recognition (1982)International eonference on pattern recognition (1984)International conference on pattern Recognition