Astronomicheski osnovi na pŭrvobŭlgarskoto letobroene
Subtitle: [monogr.] = Fondements astronomiques de l'ère protobulgare
Publisher: BAN
Published: 1974
Place of publication: Sofii︠a︡
Language: bul
Number of pages: 94
Subjects: Chronology, Bulgaro-Turkic
Other titles: Fondements astronomiques de l'ère protobulgare
Notes: At head of title: Bŭlgarska akademii︠a︡ na naukite.  Edinen t︠s︡entŭr za nauka i podgotovka na kadri po istorii︠a︡.

Summary in Russian and French.

Bibliography: p. 89.

Errata slip inserted.