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1Published 1968Sofi︠i︡a : Izd-vo na Bŭlgarskata akademi︠i︡a na naukite, 1968-v. : ill. ; 24 cm.“...Izd-vo na Bŭlgarskata akademi︠i︡a na naukite,...”
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2Published 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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3Published 1965Sofi︠i︡a : Izd-vo na Bŭlgarskata akademi︠i︡a na naukite, 1965-1967.3 v. : ill. ; 24 cm.“...Izd-vo na Bŭlgarskata akademi︠i︡a na naukite,...”