Laurini, Robert. <br/><br/>
Fundamentals of spatial information systems / 
Robert Laurini and Derek Thompson. 
 - London :  Academic Press,  [c1992]. 
 - xxiii, 680 p. 
<br/><br/><label>ISBN: </label>0124383807 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Spatial systems.<br/>Mathematical geography.<br/>Geographic information systems.