Perpendikuli͡a︡rno vreme
Subtitle: bŭlgarski khumoristichni fantastichni razkazi
By: sŭstavitel Agop Melkoni͡a︡n.
Edition: 1. izd.
Series: Biblioteka Galaktika
Publisher: Kn-vo "G. Bakalov,"
Published: 1981
Place of publication: Varna
Language: bul
Number of pages: 176