edited by J.W. de Bakker and J.C. van Vliet. edited by J. W. de Bakker and J. van Leeuwen. edited by J. T. Devreese and V. E. van Doren. edited by C.S. Creaser and A.M.C. Davies. edited by R. Barer and V.E. Cosslett. edited by B.A.J. Ponder and M.J. Waring. edited by K.W. Fuller and J.R. Gallon. edited by M.H. Walter and R.F. Cox. edited by A. Parker and B.W. Sellwood. edited by G. Sumner and V.B. Livesey.