Duggal S.K. <br/><br/>
Surveying, Vol-2, 4th Ed.  Textual Documents  
Duggal S.K. 
 - 4th Ed 
 -  McGraw Hill Education Pvt. Ltd  2016 
 - 488 
<br/><br/><label>ISBN: </label>978-1-25-902983-7   
<br/><br/><label>Dewey Class. No.: </label>625.723