Izpolzuvane na chuzhdi izobretenii͡a︡ i nauchno-tekhnicheski postizhenii͡a︡
Subtitle: [izsledvane]
By: Ivan R. Delibaltov.
Edition: 1. izd.
Publisher: Tekhnika
Published: 1979
Place of publication: Sofii͡a︡
Language: bul
Number of pages: 101
Subjects: Patents.; Inventions.; Patent licenses.
Notes: Bibliography: p. 96-[100]