The 150th Anniversary of the Birth of the Geologist Academician Georgi Bonchev (1866-2016) 2016
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2016
The 150th Anniversary of the Birth of the Geologist Academician Georgi Bonchev (1866-2016)
7. décembre WM: Aucun Taille de la feuille: 40 Modèle: Stoyan Dechev Gravure: Lithographie Perforation: 13 x 13¼
![[The 150th Anniversary of the Birth of the Geologist Academician Georgi Bonchev (1866-2016), type HBQ]](https://www.stampworld.com/media/catalogue/Bulgaria/Postage-stamps/HBQ-s.jpg)
