Progressio, Populorum. <br/><br/>
On the development of peoples /    
Populorum Progressio. 
 - New Jersey :   Association for International Development,   1957. 
 - 61 p. ;    22 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Geographic Terms: </label><br/> Developing countries -- Economic conditions.