Classification of industries according to ISIC classification and their geographical distribution in the mountainous region of Erbil province. Twejer Journal, Soran, Kurdistan regional Government,Iraq, v. 7, n. 4, p. 1563–1593, 2025. DOI: 10.31918/twejer.2574.56. Disponível em: https://journals.soran.edu.iq/index.php/Twejer/article/view/2145. Acesso em: 24 سپتامبر. 2026.