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Type: stamp Issuer: Russia Date: 2000 Denom: ? Visibility: public Image owner: none postage 6/20/2000 3.00r multi dt=Russia 20th Century Science d=N.G. Basov, A.M. Prokhorov unwmk perf=12.25x12 Crops No visible images cropped from this one. Measurements Resolution is unknown. Source Source name: Colnect File URL: http://i.colnect.net/b/2024/513/Quantum-electronics-foundations-NBasov-AProkhorov-1960s.jpg Uploaded August 12, 2015, 4:23 pm by Stan Shebs