Heavy Primary Cosmic Radiations Observed on 11 Sept. 1957 at Prince Albert, Canada Aizu, H. ; Fujimoto, Y. ; Hasegawa, S. ; Koshiba, M. ; Mito, I. ; Nishimura, J. ; Yokoi, K. Abstract Publication: Journal of the Physical Society of Japan Supplement Pub Date: 1962 Bibcode: 1962JPSJS..17C..38A