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W. C. J. Van Rensburg

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South Africa's strategic minerasl: pieces on a continental chess board. by W.C.J. van Rensbury, D.A. Pretorius and H. Glen
South Africa's strategic minerals: pieces on a continental chess board
Strategic Minerals: Major Minerals Regions of the World, Issues and Strategies (Prentice-Hall Intl Ser in World Resources, Energy, and Materials)
Elemente van 'n energie beleid vir Suid-Afrika
Reserves as a Leading Indicator to Future Mineral Production