File:107Helen Quinn at Stanford helen quinnfest.jpg

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English: Helen at Stanford in 1975, at the time she and Roberto Peccei were working on Peccei-Quinn Symmetry.
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Source Poster for Stanford Symposium honoring Helen Quinn, April 16, 2010. Taken in 1975 at Stanford, when Helen was working on Peccei-Quinn Symmetry with Roberto Peccei. Unknown photographer (official SLAC or Stanford employee?)
Author Unknown authorUnknown author

Stanford University, California

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