edited by T. R. Addis and R. M. Muir. edited by C. C. Addison and D. B. Sowerby. edited by R. G. Edwards and J. F. Porter. edited by E. Kaldis and H. J. Scheel. edited by E.D. Adams and G.G. Ihas. edited by P.J. Ellis and Y.C. Tang. edited by S. Bratos and R. M. Pick. edited by J. R. Norris and M. H. Richmond. edited by C. E. Richards and A. C. Lynch. edited by E. R. Sears and L. M. S. Sears.