Phys. Rev. Lett. 16, 748–750 (1966)End to the Cosmic-Ray Spectrum?Received 1 April 1966; published in the issue dated 25 April 1966 © 1966 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.16.748
DOI:
10.1103/PhysRevLett.16.748
PACS:
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