Beneficiation of Ferruginous Manganese Ore of Um Bogma Locality, Sinai: Comparison Between Conventional Reduction Roasting Techniques and Microwave Technology . Rud.-geol.-naft. zb. [Internet]. 2024 Nov. 25 [cited 2025 Aug. 24];39(5):89-100. Available from: https://ojs.srce.hr/index.php/rgn/article/view/30134