Krepostta ma bezsmŭrtnite
Subtitle: nauch.-fantast. razkazi
By: Svetoslav Slavchev ; khudozh. N. Ruskov
Series: Mediko-biologichni znanii͡a za mladezhta
Publisher: Medit︠s︡ina i fizkultura
Published: 1970
Place of publication: Sofii︠a︡
Language: bul
Number of pages: 155