1. The prospects for alternative leach reagents — Can precious metal producers get along without cyanide;Von Michaelis;Eng. Min. J.,1987
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3. Potential applications of thiourea in the processing of gold;Groenewald;J. S. Afr. Inst. Min. Metall.,1977
4. Thiourea leaching of gold and silver;Brent Hiskey,1983
5. Recovery of gold and silver from arseniferous pyrite cinders by thiourea leaching;Moussoulos,1984