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81Varna, Dŭrzh. izd-vo.v. ill.
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82Sofi︠i︡a, Izd-vo na BAN.2 v. ill.
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83Sofi︠i︡a : Sv︠i︡etlina.v. : ill. ; 43 cm.
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84Sofi︠i︡a : Bŭlgarsko prirodoizpitatelno druzhestvo,v. : ill. ; 30 cm.
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85Published 1961### CRL customization ### ?> ### Add publisher and desc details ### ?>Sofi︠i︡a : Izd-vo na Bŭlgarskata akademi︠i︡a na naukite, 1961-1962.2 v. : ill. ; 24 cm.
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86Published 1981### CRL customization ### ?> ### Add publisher and desc details ### ?>Sofi︠i︡a : Izd-vo na Bŭlgarskata akademi︠i︡a na naukite, 1981-v. : ill. ; 24 cm.
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87Sofi︠i︡a : Medi︠t︡sina i fizkultura,v. : ill.
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88Sofiia, Bŭchevarov.2 v.
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89Godishnik na Sofiĭskii︠a︡ universitet "Sv. Kliment Okhridski," Geologo-geografski fakultet. Annuaire de l'Université de Sofia "St. Kliment Ohridski," Faculté de géologie et géograp...Годишник на Софийския университет "Св. Климент Охридски," Геолого-географски факултет. Annuaire de l'Université de Sofia "St. Kliment Ohridski," Faculté de géologie et géographie. Livre 1, Géologie.Published 1992### CRL customization ### ?> ### Add publisher and desc details ### ?>Sofii︠a︡ : Universitetska pechatnit︠s︡a, 1992-v. : ill., maps (some folded) ; 23 cm.
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90Sofi︠i︡a : Ministerstvo na narodnata otbrana,v. : ill. ; 29 cm.
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91Sofii︠a︡ : Tekhnika.v. : ill. ; 22 cm.
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92Published 1953### CRL customization ### ?> ### Add publisher and desc details ### ?>Sofii︠a︡ : Izd. na Bŭlgarskata akademii︠a︡ na naukite, 1953-1959.6 v. : ill. ; 25 cm.
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93Published 1982### CRL customization ### ?> ### Add publisher and desc details ### ?>Sofi︠i︡a : Izd-vo na Bŭlgarskata akademi︠i︡a na naukite, 1982-1989.9 v. : ill. ; 24 cm.
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94Published 1995### CRL customization ### ?> ### Add publisher and desc details ### ?>[Sofia] : Nezavisima fonda︠t︡si︠i︡a Veterinarna medi︠t︡sina, [1995]-v. : ill. ; 29 cm.
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95Sofi︠i︡a : Komitet za kultura,v. : ill., ports. ; 24 cm.
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96Sofi︠i︡a : BAN,v. : ill.
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97Published 1974### CRL customization ### ?> ### Add publisher and desc details ### ?>Sofi︠i︡a : Tekhnika, -1974.v. : ill.
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98Sofia, Izdatelstvo na Bŭlgarska akademii︠a︡ na naukite.volumes illustrations 24 cm.
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99Sofi︠i︡a : [s.n.]v. : ill.
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100Published 1960### CRL customization ### ?> ### Add publisher and desc details ### ?>Sofi︠i︡a : Tekhnika, 1960-v. : ill.