Shane, Darrell,  1961, <br/><br/>
A topological editor for geographic data / 
Darrell Harvey Shane 
 - ix, 40 pages ;  28 cm. 
 - The Rand paper series;  P-7691 .
 - The Rand paper series;  P-7691 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geographic information systems.<br/>Text editors (Computer programs)