Bŭlgari v bezdnite na sveta
By: pod redakt͡s︡ii͡a︡ta Alekseĭ Zhalov.
Contributors: Zhalov, Alekseĭ Konstantinov.
Edition: 1. izd.
Publisher: Medit͡s︡ina i fizkultura
Published: 1986
Place of publication: Sofii͡a︡
Language: bul
Number of pages: 115
Subjects: Caving -- Europe.; Spelunkers -- Bulgaria.