Rochester, G. D., O'Ceallaigh, C., George, E. P., Galbraith, W., Whitehouse, W. J., Barton, J. C., Jelley, J. V., Sturgess, J. W., O'Ceallaigh, C. and Rochester, G. D. (1951) Papers read at Cosmic Ray Colloquium September, 1951. Communications of the Dublin Institute for Advanced Studies. ISSN Series A (Theoretical Physics) 0070-7414