Al-Akwa AA. Estimates of Marketing margins for the most important Vegetable and Fruit crops in the Republic of Yemen for the period (1990-2004). tu.edu.ye.journals [Internet]. 2023 Jan. 21 [cited 2024 Nov. 24];3(4):194-71. Available from: https://journal.tu.edu.ye/index.php/edu/article/view/1023