Tan Phong, Ho. “THE CATEGORIZATION OF ECONOMIC SECTORS AND THE DEVELOPMENT OF PRIVATE FARM SYSTEM IN AGRICULTURE”. Science and Technology Development Journal 1, no. 7&8 (August 31, 1998): 54-58. Accessed November 23, 2024. http://stdj.scienceandtechnology.com.vn/index.php/stdj/article/view/3766.