R. ABDULLAH, Waleed. CONCENTRATING OF FELDSPAR FROM Al-SAMAWA SAND DUNE. Journal of Engineering and Sustainable Development, Baghdad, Iraq, v. 22, n. 4, p. 202–210, 2018. Disponível em: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/449.. Acesso em: 13 jun. 2025.