AL-AKWA, Ahmed Ali. Estimates of Marketing margins for the most important Vegetable and Fruit crops in the Republic of Yemen for the period (1990-2004). Journal of the Faculty of Education, [S. l.], v. 3, n. 4, p. 194–171, 2023. DOI: 10.60037/edu.v1i4.1023. Disponível em: https://journal.tu.edu.ye/index.php/edu/article/view/1023. Acesso em: 22 jul. 2024.