edited by Tony Lowe and John L.J. Machin. edited by I.D. Morton, A.J. MacLeod. edited by Bertram Lubin and Lawrence J. Machlin. edited by John C. Urbach. edited by John E. Hatch. edited by John P. Devlin. edited by Donald S. Davies and John L. Reid. edited by Tony Swain and George R. Waller.