Understanding GIS :  the ARC/INFO method;self study workbook / 
Environmental Systems Research Institute 
 - California :  Environmental Systems Research Institute,  c1990. 
 - vp. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>1879102005 
<br/><br/><label>LCCN: </label>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer software<br/>Gis<br/>Geographic information systems
<br/><br/><label>LC Class. No.: </label>G70.2  / .U53 1990 
<br/><br/><label>Dewey Class. No.: </label>005.3