Organized by J. K. Grant. Edited by D. J. Bell and J. K. Grant. Organized by J.K. Grant. Edited by D.J. Bell and J.K. Grant. organized by R. M. S. Smellie and edited by R. M. S. Smellie and J. F. Pennock. organized by R. M. S. Smellie ; and edited by R. M. S. Smellie and J. F. Pennock. organized and edited by C.F. Phelps and P.H. Clarke. Organized by C. De Duve. Edited by J.K. Grant. organized and edited by P.N. Campbell and C.F. Phelps. organized and edited by C.F. Phelps and H.R.V. Arnstein. organized and edited by P.B. Garland and M.J. Crumpton.