Pŭrvi kongres, 18 maĭ 1989 g., Varna
By: Sŭi͡uz na zaĭt͡sevŭdite, gŭlŭbovŭdite i prirodoli͡ubitelite v NR Bŭlgarii͡a, T͡Sentralen sŭvet, Sofii͡a ; [sŭstavitel M. Doktorov ; redaktor St. Lazarov].
Contributors: Doktorov, M.; Lazarov, Stancho.; Sŭi͡uz na zaĭt͡sevŭdite, gŭlŭbovŭdite i prirodoli͡ubitelite v NR Bŭlgarii͡a. T͡Sentralen sŭvet, Sofii͡a.
Publisher: IKO "Inform"
Published: 1989
Place of publication: Sofii͡a
Language: bul
Number of pages: 279
Other titles: 1. kongres, 18 maĭ 1989 g., Varna.