Gutzmer, J. (1996). Genesis and alteration of the Kalahari and Postmasburg manganese deposits, Griqualand West, South Africa (Doctoral dissertation, Rand Afrikaans University).

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See Also

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	Gutzmer, J. (1996). Genesis and alteration of the Kalahari and Postmasburg manganese deposits, Griqualand West, South Africa. PhD thesis (unpublished). Rand Afrikaans University, Johannesburg, 266 pages.
	Ramos Preston, P.C.C. (2001) Physical and chemical characterisation of the manganese ore bed at Mamatwan mine, Kalahari Manganese Field. M.Sc. dissertation (unpublished), Rand Afrikaans University, Johannesburg, 140 pages.
	Van Staden, A. (2002). Characterisation of the lowermost manganese ore bed of the Hotazel Formation, Gloria mine, Kalahari Manganese Field. MSc dissertation (unpublished). Rand Afrikaans University, Johannesburg, 158 pages.
	Gutzmer, Jens, Beukes, Nicolas J. (1996) Karst-hosted fresh-water Paleoproterozoic manganese deposits, Postmasburg, South Africa. Economic Geology, 91 (8) 1435-1454 doi:10.2113/gsecongeo.91.8.1435
	Gutzmer, J. and Beukes, N.J. (1995). Fault controlled metasomatic alteration of Early Proterozoic sedimentary manganese ores in the Kalahari manganese field, South Africa. Economic Geology, 90, 823–844.
	Gutzmer, J. and Beukes, N.J. (1996). Mineral paragenesis of the Kalahari manganese field, South Africa. Ore Geology Reviews, 11, 405–428.
	Gutzmer, J. (1994) Hydrothermale Alteration von Manganerzen der Nchwaning Mine, Kalahari Manganerzfeld, Südafrika. Diploma dissertation (unpublished). Clausthal University of Technology, 158 pages.
	Gutzmer, J., Beukes, N.J. and Yeh, H-W. (1997). Metasomatic and supergene fault-controlled alteration of Early Proterozoic sedimentary manganese ore at Mamatwan Mine, Kalahari manganese field, South Africa. South African Journal of Geology, 100, 53–71.
	Gutzmer, J., Beukes, N.J., Yeh, H-W. (1997) Metasomatic and supergene fault-controlled alteration of Early Proterozoic sedimentary manganese ore at Mamatwan Mine, Kalahari manganese field, South Africa. South African Journal of Geology: 100: 53-71.
	Gutzmer, J., Beukes, N. J. (1995) Fault-controlled metasomatic alteration of early Proterozoic sedimentary manganese ores in the Kalahari manganese field, South Africa. Economic Geology, 90 (4) 823-844 doi:10.2113/gsecongeo.90.4.823
	Gutzmer, J. and Beukes, N.J. (2000). Asbestiform manjiroite and todorokite from the Kalahari manganese field, South Africa. South African Journal of Geology, 103, 163–174.