edited by C. G. Scott and C. E. Reed. edited by C. W. White, P. S. Peercy. edited by E. J. Holborow and W. G. Reeves. edited by D. G. Land and H. E. Nursten. edited by R. A. Schrack and C. D. Bowman. edited by A. C. Knipe and W. E. Watts. edited by C. H. Dash and H. E. H. Jones. edited by A. G. Cullis and D. C. Joy. edited by C. J. Allegre and S. R. Hart. edited by E. G. Derouane and A. A. Lucas.