edited by W.W.Cooper, Yuji Ijiri edited by P.G.Happer, D.L.Weaire edited by C.J.Cowper, A.J.DeRose edited by A.R.Butler, M.J.Perkins edited by Gerda Breuer, Julia Meer. edited by H.W.Hellyer, I.R.Sinclair edited by N.J.Harper, Alma B.Simmonds edited by J.C. Cooper