edited by D. J. Bell and J. K. Grant. edited by G. G. Roberts and M. J. Morant. edited by G. B. Ansell and P. B. Bradley. edited by C. S. Grunsell and A. I. Wright. edited by J. S. Russell and E. L. Greacen. edited by D. C. Malins and J. R. Sargent. edited by M. E. Bushell and J. H. Slater. edited by J. B. Fussell and G. R. Burdick. edited by M. G. R. Cannell and F. T. Last. edited by B. M. Funnell and W. R. Riedel.