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2. Principles of Chemical Sedimentology;Berner,1971
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4. Die karbonaatgesteentes en ysterformasies van die Ghaap-Groep van die Transvaal-Supergroep in Noord-Kaapland;Beukes,1978
5. Lithofacies and stratigraphy of the Kuruman and Griquatown Iron-formations, northern Cape Province, South Africa;Beukes;Trans. Geol. Soc. S. Afr.,1980