Nayar, N.B. <br/><br/>
Encyclopaedia of surveying, mapping and remote sensing 

 - Jaipur  Rawat Publications  1996 
 - 406 
<br/><br/><label>ISBN: </label>81-7033-310-6 
<br/><br/><label>Dewey Class. No.: </label>621.367  803 N231E