Phys. Rev. 94, 500–500 (1954)Proton-Neutron Mass DifferenceReceived 23 February 1954; published in the issue dated April 1954 © 1954 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRev.94.500
DOI:
10.1103/PhysRev.94.500
PACS:
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