Please note: Due to a scheduled maintenance, BOLD Systems will be offline from Friday Apr 26, 2024 4pm EDT to Sunday Apr 28, 2024 7pm EDT. We apologize for the inconvenience.
You've been logged out. Click here to log back in.
full article at Wikipedia
![( - AACRG-0017) @12 [ ] CreativeCommons - Attribution Non-Commercial Share-Alike (2013) Louis du Preez North-West University](http://v3.boldsystems.org/pics/_w300/AMPSA/AACRG-0017_IMG_3942%2B1369832844.JPG "( - AACRG-0017) {} [ ] CreativeCommons - Attribution Non-Commercial Share-Alike (2013)")
![( - AACRG3262) @11 [ ] CreativeCommons - Attribution Non-Commercial (2017) Prof LH du Preez AACRG, North-West University](http://v3.boldsystems.org/pics/_w300/LDPJR/AACRG3262%2B1509400028.jpg "( - AACRG3262) {} [ ] CreativeCommons - Attribution Non-Commercial (2017)")
![( - AACRG3214) @11 [ ] CreativeCommons - Attribution Non-Commercial (2017) Prof LH du Preez AACRG, North-West University](http://v3.boldsystems.org/pics/_w300/LDPJR/AACRG3214%2B1509401454.jpg "( - AACRG3214) {} [ ] CreativeCommons - Attribution Non-Commercial (2017)")
![( - AACRG3240) @11 [ ] CreativeCommons - Attribution Non-Commercial (2017) Prof LH du Preez AACRG, North-West University](http://v3.boldsystems.org/pics/_w300/LDPJR/AACRG3240%2B1509400744.jpg "( - AACRG3240) {} [ ] CreativeCommons - Attribution Non-Commercial (2017)")
![( - AACRG3242) @11 [ ] CreativeCommons - Attribution Non-Commercial (2017) Prof LH du Preez AACRG, North-West University](http://v3.boldsystems.org/pics/_w300/LDPJR/AACRG3242%2B1509400808.jpg "( - AACRG3242) {} [ ] CreativeCommons - Attribution Non-Commercial (2017)")
![( - AACRG3243) @11 [ ] CreativeCommons - Attribution Non-Commercial (2017) Prof LH du Preez AACRG, North-West University](http://v3.boldsystems.org/pics/_w300/LDPJR/AACRG3243%2B1509400866.jpg "( - AACRG3243) {} [ ] CreativeCommons - Attribution Non-Commercial (2017)")
![( - AACRG3261) @11 [ ] CreativeCommons - Attribution Non-Commercial (2017) Prof LH du Preez AACRG, North-West University](http://v3.boldsystems.org/pics/_w300/LDPJR/AACRG3261%2B1509399974.jpg "( - AACRG3261) {} [ ] CreativeCommons - Attribution Non-Commercial (2017)")
![( - AACRG3255) @11 [ ] CreativeCommons - Attribution Non-Commercial (2017) Prof LH du Preez AACRG, North-West University](http://v3.boldsystems.org/pics/_w300/LDPJR/AACRG3255%2B1509399648.jpg "( - AACRG3255) {} [ ] CreativeCommons - Attribution Non-Commercial (2017)")
![( - AACRG3256) @11 [ ] CreativeCommons - Attribution Non-Commercial (2017) Prof LH du Preez AACRG, North-West University](http://v3.boldsystems.org/pics/_w300/LDPJR/AACRG3256%2B1509399702.jpg "( - AACRG3256) {} [ ] CreativeCommons - Attribution Non-Commercial (2017)")
![( - AACRG3257) @11 [ ] CreativeCommons - Attribution Non-Commercial (2017) Prof LH du Preez AACRG, North-West University](http://v3.boldsystems.org/pics/_w300/LDPJR/AACRG3257%2B1509399764.jpg "( - AACRG3257) {} [ ] CreativeCommons - Attribution Non-Commercial (2017)")
![( - AACRG3258) @11 [ ] CreativeCommons - Attribution Non-Commercial (2017) Prof LH du Preez AACRG, North-West University](http://v3.boldsystems.org/pics/_w300/LDPJR/AACRG3258%2B1509399810.jpg "( - AACRG3258) {} [ ] CreativeCommons - Attribution Non-Commercial (2017)")
![( - AACRG3259) @11 [ ] CreativeCommons - Attribution Non-Commercial (2017) Prof LH du Preez AACRG, North-West University](http://v3.boldsystems.org/pics/_w300/LDPJR/AACRG3259%2B1509399858.jpg "( - AACRG3259) {} [ ] CreativeCommons - Attribution Non-Commercial (2017)")
![( - AACRG3260) @11 [ ] CreativeCommons - Attribution Non-Commercial (2017) Prof LH du Preez AACRG, North-West University](http://v3.boldsystems.org/pics/_w300/LDPJR/AACRG3260%2B1509399922.jpg "( - AACRG3260) {} [ ] CreativeCommons - Attribution Non-Commercial (2017)")
![( - AACRG3263) @11 [ ] CreativeCommons - Attribution Non-Commercial (2017) Prof LH du Preez AACRG, North-West University](http://v3.boldsystems.org/pics/_w300/LDPJR/AACRG3263%2B1509400078.jpg "( - AACRG3263) {} [ ] CreativeCommons - Attribution Non-Commercial (2017)")
![( - AACRG1815) @11 [ ] CreativeCommons - Attribution Non-Commercial (2017) Prof LH du Preez AACRG, North-West University](http://v3.boldsystems.org/pics/_w300/LDPJR/AACRG1815%2B1505533314.jpg "( - AACRG1815) {} [ ] CreativeCommons - Attribution Non-Commercial (2017)")
![( - AACRG2510) @11 [ ] CreativeCommons - Attribution Non-Commercial (2017) Prof LH du Preez AACRG, North-West University](http://v3.boldsystems.org/pics/_w300/LDPJR/AACRG2510%2B1505532634.jpg "( - AACRG2510) {} [ ] CreativeCommons - Attribution Non-Commercial (2017)")
![( - AACRG2972) @11 [ ] CreativeCommons - Attribution Non-Commercial (2017) Prof LH du Preez AACRG, North-West University](http://v3.boldsystems.org/pics/_w300/LDPJR/AACRG2972%2B1505532038.jpg "( - AACRG2972) {} [ ] CreativeCommons - Attribution Non-Commercial (2017)")
