Comparative analysis between SINAPI’s indexes and those adopted by the companies of the city of Manaus in the services of concrete production and frame. ITEGAM-JETIA, [S. l.], v. 4, n. 13, p. 176–183, 2018. DOI: 10.5935/2447-0228.201866. Disponível em: https://itegam-jetia.org/journal/index.php/jetia/article/view/66. Acesso em: 23 oct. 2026.