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Petiletkite v NR Bŭlgarii︠a︡ : [Statist. danni]
Gichev, Vladimir (ed.) - Bulgaria / Dŭrzhavno upravlenie za informat︠s︡ii︠a︡ - 1971
Persistent link: https://www.econbiz.de/10002995163
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Dvadeset godini sot︠s︡ialistichesko stroitelstvo v t︠s︡ifri
Bulgaria / T︠S︡entralno statistichesko upravlenie - 1964
Persistent link: https://www.econbiz.de/10002772576
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Bibliografski istočnici za istorijata na Turcija i Bulgarija ; 1
Michov, Nikola V. - 1914
Persistent link: https://www.econbiz.de/10000378599
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Bibliografski istočnici za istorjala na Turcija i Bulgarija ; 2
Michov, Nikola V. - 1924
Persistent link: https://www.econbiz.de/10000378600
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Bibliografski istočnici za istorjala na Turcija i Bulgarija ; 3
Michov, Nikola V. - 1928
Persistent link: https://www.econbiz.de/10000378601
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Bibliografski istočnici za istorijata na Turcija i Bălgarija ; 4
Michov, Nikola V. - 1934
Persistent link: https://www.econbiz.de/10000378602
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Sovetskaja i meždunarodnaja periodika o Bolgarii : 1917-1944 gg. Istoričeskaja bibliografija
Cernjavskij, G. I. (contributor); Sochan, P. S. (contributor) - 1970
Persistent link: https://www.econbiz.de/10000650417
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Geodezija, geofizika i geoložki nauki
1968
Persistent link: https://www.econbiz.de/10003238474
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Bălgarija otblizo : dăržavnici, obštestvenici, učeni, pisateli, žurnalisti za nas
Kjulʹovski, Ilija (contributor);  … - 1970
Persistent link: https://www.econbiz.de/10011514945
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Stratigrafija na Bălgarija
Čankov, Vasil (contributor); Spasov, Christo (contributor) - 1968
Persistent link: https://www.econbiz.de/10002266985