Quelques timbres suisses ou de personnages suisses en relation avec les sciences ou la technique |
||
 |
 |
 |
 |
 |
 |
|
 |
 |
 |
||
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
|
 |
|
 |
|
|
 |
|
|
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
|
 |
||
 |
 |
|
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
|
Quelques liens Trains on Stamps http://www.trainsofeurope.nl/stamps.html Mathematicians on Postage Stamps http://jeff560.tripod.com/stamps.html Physics-Related Stamps http://phys.bspu.by/static/hist/physstamp/physstamps.html Scientists on Stamps http://www.scientificlib.com/en/Images/ImagesOfScientists.html |
||
mars 2020 Rene Andrey en Verdau xuafleb |
||
