Impact of Environmental Factors on the Profit Efficiency of Rice Production: A Study in Vietnams Red River Delta. Global Journal of Human-Social Science, [S. l.], v. 12, n. B9, p. 15–22, 2012. Disponível em: https://socialscienceresearch.org/index.php/GJHSS/article/view/418. Acesso em: 2 sep. 2026.