SMITH. Determination of sulfate as SO3 in cement, limestone and gypsum. Materiales de Construcción, [S. l.], n. 019, p. 33–33, 1950. DOI: 10.3989/mc.1950.i019.3239. Disponível em: https://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/3239. Acesso em: 6 may. 2024.