1. Japan-Brasil Collaboration:Conference Papers, Denver Conference on Cosmic Rays, Vol.3, (Denver, Colo., 1973), p. 2227; Vol.4 (Denver, Colo., 1973), p. 2671.
2. Japan-Brasil Collaboration:Conference Paper, München Conference on Cosmic Rays, Vol.7 (München, 1975), p. 2393.
3. C. M. G. Lattes, M. S. M. Mantovani, C. Santos, E. H. Shibuya, A. Turtelli jr.,N. M. Amato, A. M. F. Endler, M. A. B. Bravo, C. Aguirre, M. Akashi, Z. Watanabe, I. Mito, K. Niu, I. Ohta, A. Osawa, T. Taira, J. Nishimura, Y. Fujimoto, Shun-ichi Hasegawa, K. Kasahara, E. Konishi, T. Shibata, N. Tateyama, N. Ogita, Y. Maeda, K. Yokoi, Y. Tsuneoka, A. Nishio, T. Ogata, M. Hazama, K. Nishikawa, Y. Oyama andS. Dake:Prog. Theor. Phys. Suppl., No.47, 1 (1971).
4. K. Yokoi: private communications. See alsoProceedings of the International Cosmic-Ray Symposium on High-Energy Phenomena (Tokyo, 1974), p. 51.
5. Japan-Brasil Collaboration: to be published.