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Rocks, minerals and gemstones of southern Africa : a colectors guide
- "Handbooks and manuals"@en
- "Rocks, minerals and gemstones of southern Africa : a colectors guide"@en
- "Rocks, minerals and gemstones of southern Africa"@en
- "Rocks, minerals and gemstones of southern Africa : a collector's guide"
- "Rocks, minerals and gemstones of Southern Africa . a collector's guide"
- "Rocks, minerals, and gemstones of Southern Africa : a collector's guide"@en
- "Rocks, minerals, and gemstones of Southern Africa : a collector's guide"