Pen, J. <br/><br/>
Modern economics / 
translated from the Dutch by Trevor S. Preston. 
 - Baltimore :  Penguin,  [1958] 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economics -- Study and teaching -- Africa--Economics -- Study and teaching -- Africa--Economics -- Study and teaching -- Africa