Observation on extremely-high energy nuclear events with emulsion chambers exposed on Mt. Chacaltaya - I Lattes, C. M. G. ; Orsini, C. Q. ; Pacca, I. G. ; da Cruz, M. T. ; Okuno, E. ; Fujimoto, Y. ; Yokoi, K. Abstract Publication: Il Nuovo Cimento Pub Date: May 1963 DOI: 10.1007/BF02828877 Bibcode: 1963NCim...28..614L