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McClung, Craig R.; Gutzmer, Jens; Beukes, Nicolas J.; Mezger, Klaus; Strauss, Harald; Gertloff, Ellen (2007). Geochemistry of bedded barite of the Mesoproterozoic Aggeneys-Gamsberg Broken Hill-type district, South Africa. Mineralium deposita, 42(5), pp. 537-549. Springer 10.1007/s00126-007-0128-4
