Singer Hans W <br/><br/>
Rich and poor countries 
Singer Hans W; Ansari Javed A 
 -  1977 
<br/><br/><label>Standard No.: </label>4571 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>X:54.1(X)'N7, L7