Beckmann Martin <br/><br/>
Spatial economics   Density, patential and flow    
Beckmann Martin; Puju Tonu 
 - Amsterdem  North-Holland            1985 
 - xii, 276p. Bibliography P 258-66  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Regional Economics
<br/><br/><label>Dewey Class. No.: </label>X;89K:(B), M5