Kni︠a︡z Boris Pʺrvi
Subtitle: Bŭlgarii︠a︡ prez vtorata polovina na IX vek
By: Vasil Gi︠u︡zelev ; retzenzent prof. Dimitʺr Angelov.
Contributors: Angelov, Dimitŭr Simeonov.
Publisher: Nauka i izkustvo
Published: 1969
Place of publication: Sofii︠a︡
Language: bul
Number of pages: 529
Subjects: Boris -- I, -- Khan of Bulgaria, -- d. 907.; Bulgaria -- History -- 681-1018.
Notes: Summary in French.