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- [4] EXTENSIVE PENETRATING COSMIC RAY SHOWERS PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1947, 191 (1027): : 517 - 523
- [7] ON THE PENETRATING COMPONENT OF COSMIC RAY AIR SHOWERS PHYSICAL REVIEW, 1949, 76 (01): : 142 - 143
- [9] LOCAL AND EXTENSIVE PENETRATING COSMIC RAY SHOWERS PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1947, 190 (1023): : 497 - 507