SURVEY OF OPERATORS KNOWLEDGE OF OPERATION AND MAINTENANCE OF FARM MACHINERY IN EBONYI STATE, NIGERIA. Nigerian Journal of Technology, [S. l.], v. 33, n. 4, p. 559–565, 2014. DOI: 10.4314/njt.334.857. Disponível em: https://mail.nijotech.com/index.php/nijotech/article/view/857. Acesso em: 3 jun. 2026.