Vŭprosnik za prouchvane na zadruzhnite proi︠a︡vi v bŭlgarskii︠a︡ stopanski bit
By: ot R. Angelova i A. Primovski
Publisher: Izd. na Bŭlgarskata akademii︠a︡ na naukite
Published: 1951
Place of publication: Sofii︠a︡
Language: bul
Number of pages: 18