Acidithiobacillus ferrooxidans Leaching of Silica-Sulfide Gold Ores from May-Hibey Deposits, Tigray, Ethiopia von Berhe, Goitom Gebreyohannes, Sbhatu, Desta Berhe, Gebre, Samuel Estifanos, Abay, Kiros Hagos, Mhretu, Genet Gebryohannes, Tesfamariam, Gebrekidan Mebrahtu, Lapiso, Samuel Alemayehu, Cheru, Mulugeta Sisay, Meressa, Afewerk Gebre

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