X-RAY PHASE ANALYSIS OF PHOSPHORITES TREATED WITH UREA NITRATE SALT AND NITRIC ACID. Scientific journal of the Fergana State University, [S. l.], v. 29, n. 4, p. 73, 2023. Disponível em: https://journal.fdu.uz/index.php/sjfsu/article/view/2716. Acesso em: 8 jan. 2026.