Image Colnect-173-082-Diffusion-of-Hertzian-Waves.jpg
(660 x 527 pixels) |
Type: stamp Issuer: Portugal Date: 1974 Denom: ?
Visibility: public Image owner: none postage 9/4/1974 1.50e multi issue=Centenary of the Birth of Marconi unwmk perf=12 Crops No visible images cropped from this one. Measurements Resolution is unknown. Source Source name: Colnect File URL: http://i.colnect.net/b/173/082/Diffusion-of-Hertzian-Waves.jpg Uploaded May 20, 2013, 4:05 pm by Stan Shebs |
