John Reynolds, Roy S. Lewis, and Frank A. Posdosek during coffee break at Gregynog for the 1976 Workshop on Isotopic Anomalies, which was organized by D. Clayton. See 1976 Gregynog Group for more details of this historic workshop. Lewis and Podosek were Berkeley PhD students with Reynolds and became leaders themselves of isotopic anomalies in meteorites. See them 23 years later at the Clemson U Washington U series of similar workshops (1999 Workshop Group).
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