Phys. Rev. Lett. 4, 564–566 (1960)Optical and Microwave-Optical Experiments in RubyReceived 22 April 1960; published in the issue dated 1 June 1960 © 1960 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.4.564
DOI:
10.1103/PhysRevLett.4.564
PACS:
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