Sani A, Ibrahim HI, Adeola SS. Competitiveness and Comparative Advantage of Rice Production in Katsina State, Nigeria. DASJ [Internet]. 2023 Dec. 30 [cited 2024 May 8];15(2):11-24. Available from: https://journal.djas.uodiyala.edu.iq/index.php/dasj/article/view/7110