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Gawie de Villiers, Giel Viljoen, Herman Booysen
Pág. 294 - 306
According to the geological history of the earth, climate change is an integral part of environmental changes that occurred over time. Sufficient evidence is provided of recurrent wet and dry and cold and hot periods due to natural circumstances. ...
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Gawie de Villiers, Giel Viljoen, Herman Booysen
Pág. 294 - 306
According to the geological history of the earth, climate change is an integral part of environmental changes that occurred over time. Sufficient evidence is provided of recurrent wet and dry and cold and hot periods due to natural circumstances. ...
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L Liebenberg, M Schutte-Smith, H G Visser
Pág. 126
Kanker is een van die grootste oorsake van sterftes in die wêreld. Volgens CA: A Cancer Journal for Clinicians is daar in 2020 wêreldwyd sowat 19,3 miljoen nuwe kankergevalle en 10 miljoen sterftes as gevolg van kanker aangemeld. ?n Kankerdiagnose het ?n...
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Estelle Gaigher
Pág. 8 bladsye
Hoewel daar heelwat internasionale navorsing gepubliseer is oor leerlinge se wanopvattings oor elektrisiteit, is daar weinig studies gedoen oor onderwysers se bewustheid van hierdie wanopvattings. Hierdie artikel doen verslag oor ?n gevallestudie om...
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Adriaan J. Reinecke, Sophia A Reinecke
Pág. 35 - 46
Grond is ?n diensverskaffende bate wat onder toenemende druk verkeer maar is ook die tuiste van ?n menigte grondlewende spesies wat bykans alle terrestriële dierfilums insluit. Die uitwerking van verandering as gevolg van menslike aktiwiteite o...
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Sinclair Davidson,David Solomon
AbstractInsider trading has been a topical issue in recent times. While the debate regarding insider trading usually extends to economic and ethical arguments in favour of or against the practice, in this article we attempt to ascertain the causes of the...
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Sinclair Davidson,David Solomon
AbstractInsider trading has been a topical issue in recent times. While the debate regarding insider trading usually extends to economic and ethical arguments in favour of or against the practice, in this article we attempt to ascertain the causes of the...
ver más
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