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Bŭlgarskoto tekhnichesko druzhestvo v arkhivnite dokumenti
Vasil Sgurev, Khristo Beloev · Izdatelstvo na BAN "Prof. Marin Drinov"
201 sayfa · 2015
Sources / Societies / Technology / Bŭlgarsko tekhnichesko druzhestvo (Ruse, Bulgaria) / History