Understanding GIS /  
Environmental System Research Institute Inc. 
 - 1st ed. 
 - USA :  The ARC/INFO Method,   1990 
 - various pages :  ill. ;  23 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0435346911 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Understanding GIS.
<br/><br/><label>Dewey Class. No.: </label>910.285  / ENU