An Experiment on Air Showers Produced by High-Energy Cosmic Rays Clark, G. ; Earl, J. ; Kraushaar, W. ; Linsley, J. ; Rossi, B. ; Scherb, F. Abstract Publication: Nature Pub Date: August 1957 DOI: 10.1038/180353a0 Bibcode: 1957Natur.180..353C