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2. Evolution of rendingan-ulubelu-waypanas (RUW) geothermal system lampung, Indonesia;Suharno,2005
3. A literature review of titanium metallurgical processes;Zhang;Hydrometallurgy,2011
4. Indonesian banded iron formation (BIF): a new controversial discovery of BIF deposit associated with island arc system in tanggamus area – lampung, South sumatra;Subandrio;Jurnal Geoaplika,2006