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Type: stamp Issuer: Cuba Date: 1965 Denom: ? Visibility: public Image owner: none postage 5/10/1965 30c multi issue=International Quiet Sun Year d=Solar rays unwmk perf=10 Crops No visible images cropped from this one. Measurements Resolution is unknown. Source Source name: Colnect File URL: http://i.colnect.net/b/2355/404/Effect-of-solar-rays-on-various-atmospheric-layers.jpg Uploaded January 21, 2015, 3:29 pm by Stan Shebs