Proceedings of the Digital Terrain Models (DTM) SymposiumSt Louis, Missouri, May 9-11, 1978. 

 - Falls Church, Virginia :  American Society of Photogrammetry,  1978. 
 - ix, 567 p. :  ill., maps 
 = Digital terrain models. 
<br/><br/><label>LCCN: </label>10250175 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Aerial photogrammetry.<br/>Cartography.