1. ?The Need and Scope for Improved Machine Design,? Conf. on Engineering Design of Plastics Processing Machinery, Bradford, England (April 1974).
2. and ?Development of Computer Control Strategies for Plastics Extruders,? Conf. Engineering Design of Plastics Processing Machinery, Bradford, England (April 1974).
3. and ?Instabilities in Polymer Processing? Engineering Foundation Conf. on Engineering Problem Areas Interfacing with Rheology, Asilomar, California (January 1975).