Bŭlgarski otkrivateli i izobretateli
By: Vani͡a︡ Relʹovska ... [et al.].
Contributors: Relʹovska, Vani͡a︡.
Edition: 1. izd.
Publisher: Dŭrzh. izd-vo "Tekhnika"
Published: 1986
Place of publication: Sofii͡a︡
Language: bul
Number of pages: 121
Subjects: Inventions -- Bulgaria.; Inventors -- Bulgaria.
Notes: Summary in English, German, and Russian.