Edited by H.W. Wilson and J.A. Hammerton. edited by D.A. Linkens and D.P. Atherton. edited by G.G. Gibson and R. Walker. edited by I.H. Wilson and K.G. Stephens. edited by T.H. Hyde and E. Ollerton. edited by J.R.A. Pearson and S.M. Richardson. edited by C. Veeger and W.E. Newton. edited by J. Carlsson and N.G. Ohlson. edited by N.G. Carr and B.A. Whitton. edited by C. C. Addison and D. B. Sowerby.