HAMIDULLAH, S.; SHAH, M. T.; KHAN, M. A. Identification and characterization of the quality of silica sand resources from Munda Gucha, district Mansehra, in glass making. Journal of Himalayan Earth Sciences, [S. l.], v. 29, n. 1, p. 59-68, 1996. Disponível em: http://ojs.uop.edu.pk/jhes/article/view/1486. Acesso em: 1 jan. 2025.