Ed. by T. L. Williams.International Seminar on Advances in Optical Production Technology ( 1977 : London )：Advances in Optical Production Technology.Society of Photo-Optical Instrumentation Engineers,1977.
ed. by T. L. Williams.International Symposium on Assessment of Imaging Systems (1976 : London)：Assessment of imaging systems, proceedings.Society of Photo-Optical Instrumentation Engineers,1976.
