Kraak M. <br/><br/>
Cartography  Visualization of Spatial Data 
Menno-Jan and Ferjan Ormeling 
 - 3rd ed. 
 - England  Pearson Education Limited  2010 
 - xii, 198p.  pbk, ill. 
<br/><br/><label>ISBN: </label>9780273722793 
<br/><br/><label>LC Class. No.: </label>GA105.3.07 2010