organized by Sira Institute ; editor, T. L. Williams. organised by Sira Institute ; editor, W. D. Lawson. organised by Sira Institute Limited. organized and edited by R. T. Williams. organised by the Welding Institute ; edited by P.T. Houldcroft. organized by The Institute of Civil Engineers. organised by Sira Institute Ltd. as one of its OPTECH '78 events. organized by P. Harremoes ; executive editor, S.H. Jenkins. organized by Swiss Federal Institute of Technology Lakusanne. organised by Institute of Welding ...[et al.].