UNESCO <br/><br/>
Why people move: comparative perspectives on the dynamics of internal migration 
/edited by Jorge Balan 
 - Paris  Unesco press  1981 
 - 342 p. 
<br/><br/> Includes appendixes.<br/> 
<br/><br/><label>ISBN: </label>9231019090 
<br/><br/><label>Dewey Class. No.: </label>325  / UNE