Chetvŭrta Nat͡sionalna konferent͡sii͡a po speleologii͡a na tema--Vrŭzkata mezhdu naukata i praktikata v speleologii͡ata
Subtitle: 31 III--3 IV 1983 g.
Contributors: Bŭlgarski turisticheski sŭi͡uz. T͡Sentralen sŭvet.; Bŭlgarska federat͡sii͡a po peshterno delo.
Publisher: s.n.
Published: 1983
Place of publication: [Sofia
Language: bul
Number of pages: 63
Subjects: Caving -- Bulgaria -- Congresses.; Speleology -- Congresses.
Other titles: 4. Nat͡sionalna konferent͡sii͡a po speleologii͡a na tema--Vrŭzkata mezhdu naukata i praktikata v speleologii͡ata.
Notes: At head of title: T͡Sentralen sŭvet na Bŭlgarski turisticheski sŭi͡uz. Bŭlgarska federat͡sii͡a po peshterno delo.