Beckmann, Martin L. <br/><br/>
Spatial structures / 
Martin J. Beckmann, Tonu Puu 
 - Berlin :  Springer-Verlag,  1990 
 - 139 p. :  ill. ;  24 cm. 
 - Advances in spatial and network economics .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Space in economics