Unnikrishnan, A <br/><br/>
Some hierarchical data structures based on quadtrees 
A, Unnikrishnan 
 - Bangalore:  Indian Institute of Science,  1987. 
 - 173p. : 
<br/><br/>PhD;1987;Electrical Engineering 
<br/><br/><label>Dewey Class. No.: </label>001.64 N87