edited by J.D. Collinson and J. Lewin. edited by J.B. Wilkinson, R.J. Moore. edited by J. H. L. Henson and A. Whelan. edited by J. D. Williams and A. M. Geddes. edited by J.D. Coelho and L.V. Tavares. edited by J.S. Robinson. edited by B. W. Collins and Ronald Fraser. edited by A. E. Dixon and J. D. Leslie. edited by J. S. Robinson. edited by J. Tinsley Oden.