محمود, . (2020). Trade relations analysis between Egypt and the Nile Basin countries Using the Gravity model. test, 21(العدد الرابع- الجزء الثانی), 219-245. doi: 10.21608/jsst.2020.37322.1090
سالي محمد فريد محمود. "Trade relations analysis between Egypt and the Nile Basin countries Using the Gravity model". test, 21, العدد الرابع- الجزء الثانی, 2020, 219-245. doi: 10.21608/jsst.2020.37322.1090
محمود, . (2020). 'Trade relations analysis between Egypt and the Nile Basin countries Using the Gravity model', test, 21(العدد الرابع- الجزء الثانی), pp. 219-245. doi: 10.21608/jsst.2020.37322.1090
محمود, . Trade relations analysis between Egypt and the Nile Basin countries Using the Gravity model. test, 2020; 21(العدد الرابع- الجزء الثانی): 219-245. doi: 10.21608/jsst.2020.37322.1090