Edited by G. K. Batchelor and R. M. Davies. edited by I. M. Barbour and A. T. Davies. edited by W.G. Cutler and R.C. Davis. edited by A. R. Butler and M. J. Perkins. edited by C.S. Creaser and A.M.C. Davies. edited by D.G. Jones and D.R. Davies. edited by D. G. Lainiotis and N. S. Tzannes. edited by D. W. Slocum and O. R. Hughes. edited by E. J. Holborow and W. G. Reeves. edited by J. D. Williams and A. M. Geddes.