J. HALL, A.; A. MOHAMMAD, H. Measurement of Quantitative Colour Values of Ore Minerals Using a Filter-Photocell Method. Iraqi National Journal of Earth Science (INJES), [S. l.], v. 12, n. 1, p. 23–38, 2012. DOI: 10.33899/earth.2012.36135. Disponível em: https://ojs.uomosul.edu.iq/index.php/injes/article/view/40889. Acesso em: 4 sep. 2025.