Spatial contrast  report of a workshop held in Amsterdam, January 4-9, 1976 / 
Edited by H. Spekreijse and L. H. Van Der Tweel. 
 - Amsterdam :  North-Holland Publishing Company,  1977. 
 - 153 p. :  ill. ;  25 cm. 
<br/><br/><label>ISBN: </label>0720484391 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Spatial systems.