Sto godini Bulgarska akademiya na naukite
Subtitle: turzhestveno chestvuvane oktomvri 1969 g
By: pod red. V.Georgiev, I. Pashev (i) S. Bozhkov.
Publisher: Bulgarska akademiya na naukite
Published: 1972
Place of publication: Sofiya
Language: bul
Notes: Added title page in French.