Tan Phong H. THE CATEGORIZATION OF ECONOMIC SECTORS AND THE DEVELOPMENT OF PRIVATE FARM SYSTEM IN AGRICULTURE. VNUHCM Journal of Science and Technology Development [Internet]. 31Aug.1998 [cited 10May2025];1(7&8):54-8. Available from: http://stdj.scienceandtechnology.com.vn/index.php/stdj/article/view/3766