South African Coal Estates (Witbank) Ltd.
- ZA HPRA A1138-YY-1996
- Pasta/Processo
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South African Coal Estates (Witbank) Ltd.
Oogies Navigation Colliery Ltd.
Middelburg Steam Coal and Coke Co., Ltd.
Cornelia Colliery - Vereeniging Estates
Geological Survey 1911 - Report Coal Resources of S. Africa