1300 godini bŭlgarska dŭrzhava
Subtitle: Nat͡sionalna nauchna sesii͡a po matematika, Veliko Tŭrnovo, 31.X. i 1.XI.1980 godina.
Publisher: s.n.
Published: 1980
Place of publication: [Veliko Tŭrnovo
Language: bul
Number of pages: 99