Johnston R.J. Ed. <br/><br/>
The Dictionary of Human Geography 
Johnston R.J. Ed. 
 - 4rth Ed. 
 - Oxford  Blakwell Publishers UK          1981 
 - 658p.  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>U47k, M1;P0/TD