Razkrivane, ot͡senka i zashtita na izobretenii͡ata
By: Li͡ubov S. Nencheva.
Edition: 1. izd.
Series: Biblioteka na izobretateli͡a i rat͡sionalizatora
Publisher: Dŭrzh. izd-vo "Tekhnika"
Published: 1985
Place of publication: Sofii͡a
Language: bul
Number of pages: 109
Subjects: Inventions -- Bulgaria.; Patents -- Bulgaria.
Notes: Bibliography: p. 107.