DOI:https://doi.org/10.1103/PhysRevLett.21.266.3
©1968 American Physical Society
Irwin I. Shapiro, Gordon H. Pettengill, Michael E. Ash, Melvin L. Stone, William B. Smith, Richard P. Ingalls, and Richard A. Brockelman
Vol. 21, Iss. 4 — 22 July 1968
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