Soviet stamp commemorating academician Mstislav Keldysh (1911-1978), a Soviet scientist in the field of mathematics and mechanics, and a key figure behind Soviet space program. Issued in 1981. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Giphotostock |
Taille de l’image : | 2946 px × 4092 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |