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Type: stamp Issuer: Germany Date: 1994 Denom: ? Visibility: public Image owner: none postage 5/5/1994 100(pf) multi issue=Europa 1994 d=quantum theory unwmk perf=14 Crops No visible images cropped from this one. Measurements Resolution is unknown. Source Source name: Colnect File URL: http://i.colnect.net/b/153/999/Radiation-from-black-body---formula-Max-Planck-s-Quantum-Le.jpg Uploaded September 2, 2014, 2:47 pm by Stan Shebs