Duggal, S.K. <br/><br/>
Surveying 

 - 1st. 
 - Delhi:   Tata  Mcgraw - Hill  Publishing  Limited,   . 
 - 390p. 
<br/><br/><label>Subjects--Personal Names: </label><br/>Geography, Mathemetical Geography. 
<br/><br/><label>Dewey Class. No.: </label>526.9