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BG Rohrback and IR Kaplan. ""Geochemistry of artificially heated humic and sapropelic sediments. I. Protokerogen."" Am. Assoc. Pet. Geo...

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UM Schreiber and M Van Der Neut. ""A review of the sedimentology of the Early Proterozoic Pretoria Group

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Brian R Turner and Richard G Vos. ""Evidence of tidal processes from the lower part of the Witwatersrand Supergroup

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