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The beginning of the Polish-Bulgarian agreement of friendship, cooperation and mutual help
Stanisławska, Stefania - 1970
Persistent link: https://www.econbiz.de/10002868154
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Bratstvo, družba
Karastojanov, Georgi (contributor);  … - 1970
Persistent link: https://www.econbiz.de/10003083612
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SSSR i izgraždaneto na socialističeska Bălgarija. 60 godini Oktomvri. (Autorenkollektiv)
Stanev, Stefan (contributor) - 1977
Persistent link: https://www.econbiz.de/10000582982
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Za vsestranno razvitie na bŭlgaro-jugoslavskite otnošeniija : deklaratcija na M-voto na vŭnšite raboti na NRB
Komitov, R. (contributor) - Bulgaria / Ministerstvo na vŭnšnite raboti - 1978
Persistent link: https://www.econbiz.de/10000414681
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NRB--GDR, druzhba i sŭtrudnichestvo
Aleksandrov, Emil (contributor); Petkov, Petko (contributor) - Bŭlgarska akademii︠a︡ na naukite, Sofia / Institut … - 1979
Persistent link: https://www.econbiz.de/10000329348
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Balcanii : zonă a păcii cooperării şi bunei vecinătăţi
Macovescu, George (contributor) - 1976
Persistent link: https://www.econbiz.de/10003075892
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Bulgarien und Rumänien im Weltkommunismus
1965
Persistent link: https://www.econbiz.de/10000572570
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Istoričeski etap v družbata i vsestrannoto sǔtrudničestvo meždu SSSR i NR Bǔlgarija
Kolev, Kolju - In: Novo vreme : teoretično spisanie za socialni idei, … 49 (1973) 12, pp. 24-36
Persistent link: https://www.econbiz.de/10002230381
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The Balkan policy of the Peopleʹs Republic of Bulgaria
Kyulyovski, Iliya - 1972
Persistent link: https://www.econbiz.de/10002221397
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Bŭlgaro-rumŭnskite otnošenija prez perioda avgust 1944-januari 1948 g.
Kiškilova, Paraškeva - In: Balkanski prou'cvanija XX vek, (pp. 5-17). 1972
Persistent link: https://www.econbiz.de/10002190872