DOI:https://doi.org/10.1103/PhysRevLett.19.857
©1967 American Physical Society
K. J. Foley, R. S. Jones, S. J. Lindenbaum, W. A. Love, S. Ozaki, E. D. Platner, C. A. Quarles, and E. H. Willen
Vol. 19, Iss. 15 — 9 October 1967
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