Philatelia.Net / The literature / Stamps /
Series: Academy of Sciences Members
USSR, 1963, 4 kop. 11 (1/2). multicoloured
Catalogues: CFA "Souzpechat": 2833Michel: 2807Scott: 2714Stanley Gibbons: 2826Yvert et Tellier: 2703
Plots: Obruchev Vladimir