GIS/LIS '89 :  proceedings of the annual conference and exposition / 
sponsored by American Congress on Surveying and Mapping ... [et al.]. 
 - Bethesda, Maryland :  American Society for Photogrammetry and Remote Sensing :  American Congress on Surveying and Mapping,  c1989. 
 - xvii, 380p. :  ill. ;  23 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0944426611 (pbk.) 094442662X ( pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geography--Data processing--Congresses.<br/>Information storage and retrieval systems--Geography--Congresses.