Rila, priroda i resursi
By: Kiril Stoĭchev, Petŭr Petrov.
Contributors: Petrov, Petŭr V.
Publisher: Nauka i izkustvo
Published: 1981
Place of publication: Sofii͡a︡
Language: bul
Number of pages: 203
Subjects: Natural history -- Bulgaria -- Rila Mountains Region.; Mountain ecology -- Bulgaria -- Rila Mountains Region.; Rila Mountains Region (Bulgaria)
Notes: Bibliography: p. 197-201.