Johnston, R.J. <br/><br/>
Spatial structures :  introducung the study of spatial systems in human geography / 
R.J.Johnston. 
 - London :  Methuem,  1973. 
 - 137 p, ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/>392  392 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Human geography.
<br/><br/><label>Dewey Class. No.: </label>910.02 / J64s