Clarke, Keith C. <br/><br/>
Getting started with geographic information systems / 
Keith C. Clarke. 
 - 4th  ed. 
 - Upper Saddle River, NJ. :  Prentice Hall,  2003. 
 - xii, 340  p. +  1 CD-ROM. 
<br/><br/><label>ISBN: </label>0130460273 : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geographic information systems.