Chemical Composition of Heavy Cosmic Ray Nuclei above 5 GV. Casse, M. ; Koch, L. ; Lund, N. ; Meyer, J. -P. ; Peters, B. ; Soutoul, A. ; Tandon, S. N. Abstract Publication: 12th International Cosmic Ray Conference (ICRC12), Volume 1 Pub Date: 1971 Bibcode: 1971ICRC....1..241C