Potgieter, Petrus H. and Rosinger, Elemér E. (2007): Is Economics Entering its Post-Witchcraft Era?
Potgieter, Petrus H. and Rosinger, Elemér E. (2007): Is Economics Entering its Post-Witchcraft Era?
Potgieter, Petrus H. (2010): Water and energy in South Africa – managing scarcity.
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