Verster T L <br/><br/>
Educational Themes In Time Perspective Part 1 T L Verster A M C Theron And A E Van Zyl 

 -  Durban : Butterworths 1982. 
 - 135 
<br/><br/><br/>Eng 
<br/><br/><label>ISBN: </label>0409102423(Hbk):