TRAN THI, D. IMPROVING THE ECONOMIC EFFICIENCY OF GRAPEFRUIT FARMS IN PHUC NINH COMMUNE - YEN SON DISTRICT - TUYEN QUANG PROVINCE. SCIENTIFIC JOURNAL OF TAN TRAO UNIVERSITY, [S. l.], v. 7, n. 24, 2022. DOI: 10.51453/2354-1431/2021/684. Disponível em: https://tckh.daihoctantrao.edu.vn/index.php/sjttu/article/view/684. Acesso em: 6 may. 2024.