Bulgarian academic books.
Bŭlgarska akademii︠a︡ na naukite.
Sofia : Bulgarian Academy of Sciences,
1969-
Has also a cumulative edition covering 1969-1980.
"Catalogue of the books and periodicals of the Bulgarian Academy of Sciences and the Academy of Agricultural sciences in Bulgaria".
A continuation of: Mishaĭkov, Ivan. 100 years Bulgarian academic books.
Bŭlgarska akademii︠a︡ na naukite
Akademii︠a︡ na selskostopanskite nauki