George,T.V. <br/><br/>
Survey / 

 - 7th ed. 
 - Thiruvananthapuram :  State institute of languages,  2012. 
<br/><br/><br/>In Malayalam. 
<br/><br/><label>ISBN: </label>9788176382335 
<br/><br/><label>Subjects--Index Terms: </label>Suveying