edited by P. L. Hawkes, D. W. Davies and W. L. Price. edited by N.R. Baker, W.J. Davies, C.K. Ong. edited by Donald S. Davies and John L. Reid. edited by Y. R. Dommergues and S. V. Krupa. edited by C.E. Vandoni and D.A. Duce. edited by Arnold M. Bass and H. P. Broida. edited by C. E. Richards and A. C. Lynch. edited by I. Davies and D.C. Sigee. edited by J. Rhodes and J. Spence. edited by J.L. Atwood, J.E.D. Davies, D.D. MacNicol.