Rŭkovodstvo za polzvane na patentnii͡a︡ fond
By: [St. T͡S︡vetkova ... et al.].
Contributors: T͡S︡vetkova, St.; T͡S︡entralen institut za nauchna i tekhnicheska informat͡s︡ii͡a︡.; T͡S︡entralna nauchno-tekhnicheska biblioteka (Bulgaria)
Publisher: T͡S︡entralen institut za nauchna i tekhnicheska informat͡s︡ii͡a︡; T͡S︡entralna nauchno-tekhnicheska biblioteka
Published: 1981
Place of publication: Sofii͡a︡
Language: bul
Number of pages: 89
Subjects: Patent laws and legislation.