From Zikpkin, Brooks, Hanchar, Toth and Schick, The Preferential Collection and Use of Ochre Pigments and Iron Ores at Twin Rivers Kopje, Zambia.

From Zikpkin, Brooks, Hanchar, Toth and Schick, The Preferential Collection and Use of Ochre Pigments and Iron Ores at Twin Rivers Kopje, Zambia.

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