Ralston, Bruce A. <br/><br/>
GIS and public data 
Bruce Ralston 
 - Clifton Park, N.Y.  Thomson/Delmar Learning  c2004 
 - xii, 220p.:  ill.  24cm  1 CD-ROM 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>1401877818 
<br/><br/><label>Subjects--Topical Terms: </label><br/>GEN<br/>Geographic information systems.<br/>Information services