Stamps of Germany, German Nobelists 100th issue
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1979, Aug 9 German Nobelists 100th issue unwmk p. 14
| - | 60 | multi | diagram of photoelectric effect (Albert Einstein) | |||
| X | 60 | multi | Hahn | |||
| X | 60 | multi | Diffraction pattern of X-rays passed through crystal |
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