International Union of Pure and Applied Physics; Max-Planck-Institut fuer Physik und Astrophysik, Garching/Muenchen (Germany, F.R.). Inst. fuer Extraterrestrische Physik; p. 2842; 1975; 14. international cosmic ray conference; Muenchen, F.R. Germany; 15 Aug 1975; Short communication only. Available from ZAED.