Elements of spatial structure : a quantitative approach 
by Andrew D. Cliff...[et al.] 
 - London  Cambridge University Press  1975 
 - xvii, 258p.: ill., fig.  ;  24cm. 
<br/><br/><label>ISBN: </label>9780521112727 
<br/><br/><label>Dewey Class. No.: </label>309.250184  / ELE