Nepublikuvani pisma.
Publisher: Bŭlgarska akademii͡a︡ na naukite
Published: 1955
Place of publication: Sofii͡a︡
Language: bul
Number of pages: 212
Notes: At head of title: Bŭlgarska akademii͡a︡ na naukite.  Institut za bŭlgarska literatura.