Browsing by Author Sitanggang Justians Mangasal
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| Preview | Issue Date | Title | Author(s) |
|---|---|---|---|
 | 1979 | Kimiabumi batuan granit yang mengandungi timah primer dari Sungai Besi mines dan Salak South Quarry, Selangor, Malaysia | Sitanggang Justians Mangasal |