Nat͡s︡ionalna otraslova klasifikat͡s︡ii͡a︡ (NOK).
Contributors: Bulgaria.; Nat͡s︡ionalen statisticheski institut (Bulgaria)
Publisher: Nat͡s︡ionalen statisticheski in-t
Published: 1998
Place of publication: [Sofia?]
Language: bul
Number of pages: 264
Subjects: Industries -- Bulgaria -- Classification.; Industrial laws and legislation -- Bulgaria.