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Priroda i resursi
Mišev, Kiril (revision) - 1989
Persistent link: https://www.econbiz.de/10000805853
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Gorite i gorskoto stopanstvo v Bŭlgarii︠a︡
Petkov, Ĭordan Zafirov - 1963
Persistent link: https://www.econbiz.de/10003025138
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Goritě i gorskoto stopanstvo v Bǔlgarija 1879-1912 : S 31 obrazi v teksta
Brǔnčev, Stojan - 1918
Persistent link: https://www.econbiz.de/10001960206
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Ikonomičesko rajonirane na NR Bŭlgarija
Zachariev, Ivan (contributor);  … - 1963
Persistent link: https://www.econbiz.de/10014386894
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Problemi na specialnite biblioteki : usăvăršenstvuvane na bibliotečno-bibliografskata dejnost ; tematičen sbornik 1986
Savova, Elena Vălčova (contributor) - 1987
Persistent link: https://www.econbiz.de/10000737929
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Bălgaro-săvetski otnošenija i vrăzki : dokumenti i materiali
Christov, Christo; Zlatev, Zlatko Denev; Zlydnev, Vitalij I. - 1988
Persistent link: https://www.econbiz.de/10000748200
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Vzaimna otgovornost i sătrudničestvo
Dojkin, Zavarin - 1983
Persistent link: https://www.econbiz.de/10000752216
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Usăvăršenstvuvane upravlenieto na sferata na obrăštenieto
Sălova, Nikolinka (contributor); Rabinovič, I. (contributor) - 1985
Persistent link: https://www.econbiz.de/10000752376
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Preustrojstvoto na ikonomičeskija mechanizăm v SSSR
Kirov, Christo - 1988
Persistent link: https://www.econbiz.de/10000754747
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Usăvăršenstvuvane na ikonomičeskija mechanizăm v SSSR, GDR, ČSSR, PNR i UNR
Kirov, Christo - 1987
Persistent link: https://www.econbiz.de/10000763151