edited by E.H. Mamdani, B.R. Gaines. edited by D.G. Jones and D.R. Davies. edited by E.J. Holborow, W.G. Reeves. edited by C.S. Creaser and A.M.C. Davies. edited by I. M. Barbour and A. T. Davies. edited by D. Rickwood, B.D. Hames. edited by D. W. Slocum and O. R. Hughes. edited by D.J. Greenland and M.H.B. Hayes. edited by D. G. Lainiotis and N. S. Tzannes. edited by D. Rickwood and B.D. Hames.