Nabil Mohemmed Al-Hazmi. “Obstacles to Agricultural Marketing of Dates Crop in Date Production Companies in the Kingdom of Saudi Arabia: (An Applied Study on the Production Companies of Dates in Al-Kharj Governorate)”. International Journal of Modern Agriculture, vol. 10, no. 2, Mar. 2021, pp. 1665 -73, http://modern-journals.com/index.php/ijma/article/view/902.