Blagoustroenite peshteri v Bŭlgarii͡a︡
By: Vladimir Popov.
Edition: 1. izd.
Publisher: Medit͡s︡ina i fizkultura
Published: 1987
Place of publication: Sofii͡a︡
Language: bul
Number of pages: 73
Subjects: Caves -- Bulgaria.
Notes: Bibliography: p. [75].