YOUSIF AZIZ, K. Measurement and analysis of technical efficiency in the production of wheat and barley crops in Erbil Governorate for the agricultural season 2020-2021. Zanco Journal of Human Sciences, [S. l.], v. 26, n. 2, p. 161–172, 2022. DOI: 10.21271/zjhs.26.2.11. Disponível em: https://zancojournal.su.edu.krd/index.php/JAHS/article/view/139. Acesso em: 18 may. 2024.