1. I. Skillicorn andM. S. Webster: BNL Internal Report H-10 (1962).
2. In an attempt to test the effect of the background events in reaction (2), we applied more severe selection criteria to the complete sample to obtain a less contaminated subsample of events. Various distributions for the cleaner sample were then compared with the distributions obtained using all the events. No essential differences were observed between the two sets of data.
3. A. H. Rosenfeld, A. Barbaro-Galtieri, W. H. Barkas, P. L. Bastien, J. Kirz andM. Roos:Rev. Mod. Phys.,37, 633 (1965).
4. See for example the work of the Aachen-Berlin-CERN Collaboration (ABC) inPhys. Lett.,19, 608 (1965);
5. Papers submitted to theDubna Conference (1964);