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English language
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61Published 1967Sofii︠a︡ : Izd-vo na Bŭlgarskata akademii︠a︡ na naukite, 1967-1968.2 v. : ill. ; 24 cm.“...Izd-vo na Bŭlgarskata akademii︠a︡ na naukite,...”
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62Published 1967Sofi︠i︡a : Izd-vo na Bŭlgarskata akademi︠i︡a na naukite, 1967.535 p. : maps + 1 atlas ([82] leaves : 42 maps)“...Izd-vo na Bŭlgarskata akademi︠i︡a na naukite,...”
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63Sofia, Izd-vo na Bŭlgarskata akademi︠i︡a na naukite.v. ill. 25 cm.“...Izd-vo na Bŭlgarskata akademi︠i︡a na naukite....”
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64Published 1974Sofii︠a︡ : Izd-vo na Bŭlgarskata akademii︠a︡ na naukite, -1974.6 v. : ill., maps ; 25 cm.“...Izd-vo na Bŭlgarskata akademii︠a︡ na naukite,...”
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65[Sofi︠i︡a, Izd-vo na Bŭlgarskata akademi︠i︡a na naukite]v. ill. 24 cm.“...Izd-vo na Bŭlgarskata akademi︠i︡a na naukite]...”
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66Published 1968Sofi︠i︡a : Izd-vo na Bŭlgarskata akademi︠i︡a na naukite, 1968-1974.7 v. : ill. ; 24 cm.“...Izd-vo na Bŭlgarskata akademi︠i︡a na naukite,...”
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67by Kolarova, El. (Elena)
Published 1964Sofi︠i︡a : Izd-vo na Bŭlgarskata akademi︠i︡a na naukite, 1964.126 p. : ill. ; 25 cm.“...Izd-vo na Bŭlgarskata akademi︠i︡a na naukite,...”
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68Published 1972Sofi︠i︡a : Izd-vo na Bŭlgarskata akademi︠i︡a na naukite, 1972-v. : ill.“...Izd-vo na Bŭlgarskata akademi︠i︡a na naukite,...”
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69Published 1967Sofi︠i︡a : Izd-vo na Bŭlgarskata akademi︠i︡a na naukite, 1967.271 p. : ill.“...Izd-vo na Bŭlgarskata akademi︠i︡a na naukite,...”
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70by Barov, Varvari
Published 1966Sofi︠i︡a : Izd-vo na Bŭlgarskata akademi︠i︡a na naukite, 1966.180 p.“...Izd-vo na Bŭlgarskata akademi︠i︡a na naukite,...”
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71Published 1966Sofi︠i︡a : Izd-vo na Bŭlgarskata akademi︠i︡a na naukite, 1966.301 p. : ill.“...Izd-vo na Bŭlgarskata akademi︠i︡a na naukite,...”
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72Published 1964Sofi︠i︡a : Izd-vo na Bŭlgarskata akademi︠i︡a na naukite, 1964-1967.3 v. : ill. ; 24 cm.“...Izd-vo na Bŭlgarskata akademi︠i︡a na naukite,...”
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73Published 1972Sofi︠i︡a : Izd-vo na Bŭlgarskata akademi︠i︡a na naukite, 1972-1974.3 v. : ill., ports.“...Izd-vo na Bŭlgarskata akademi︠i︡a na naukite,...”
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74Published 1964Sofi︠i︡a : Izd-vo na Bŭlgarskata akademi︠i︡a na naukite, 1964.1 v. : ill. ; 24 cm.“...Izd-vo na Bŭlgarskata akademi︠i︡a na naukite,...”
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75Published 1964Sofi︠i︡a : Izd-vo na Bŭlgarskata akademi︠i︡a na naukite, 1964.1 v. : ill. ; 24 cm.“...Izd-vo na Bŭlgarskata akademi︠i︡a na naukite,...”
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76[Sofi︠i︡a, Izd-vo na Bŭlgarskata akademi︠i︡a na naukite]ill. 24 cm.“...Izd-vo na Bŭlgarskata akademi︠i︡a na naukite]...”
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77Published 1965Sofi︠i︡a : Izd-vo na Bŭlgarskata akademi︠i︡a na naukite, 1965-1974.17 v. : ill. ; 24 cm.“...Izd-vo na Bŭlgarskata akademi︠i︡a na naukite,...”
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78Published 1975Sofi︠i︡a : Izd-vo na Bŭlgarskata akademi︠i︡a na naukite, 1975-v. : ill.“...Izd-vo na Bŭlgarskata akademi︠i︡a na naukite,...”
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79Published 1988Sofi︠i︡a : Izd-vo na Bŭlgarskata akademi︠i︡a na naukite, 1988-v. : ill. ; 24 cm.“...Izd-vo na Bŭlgarskata akademi︠i︡a na naukite,...”
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80Published 1964Sofi︠i︡a : Izd-vo na Bŭlgarskata akademi︠i︡a na naukite, 1964.1 v. : ill. ; 24 cm.“...Izd-vo na Bŭlgarskata akademi︠i︡a na naukite,...”