TY  - BOOK
AU  - Johnston R J
TI  - Spatial Structures:  Introducing  the study of spatial systems in human geography   
T2  - Field of Geography Ed by W B Morgan and J C Pugh
SN  - 416 76650 1
U1  - X:89K, L3/TD3 
PY  - 1973///
CY  - London
PB  - Methuen & co. Ltd.       
ER  -