PRODUCTION OF MANUAL METAL ARC WELDING ELECTRODES WITH LOCAL RAW MATERIALS. Nigerian Journal of Technology, [S. l.], v. 29, n. 1, p. 61–65, 2009. DOI: 10.4314/njt.291.142. Disponível em: https://www.nijotech.com/index.php/nijotech/article/view/142. Acesso em: 13 jan. 2026.