ZHANG, Jinyang; ZHANG, Jing; LEI, Na. Research on the Analysis of Obstacle Factors in Medium - and Low - Yield Farmland and Its Improvement Countermeasures. International Journal of Social Sciences and Public Administration, [S. l.], v. 6, n. 2, p. 60–62, 2025. DOI: 10.62051/ijsspa.v6n2.07. Disponível em: https://ijsspa.org/index.php/ojs/article/view/7. Acesso em: 7 aug. 2026.