TY  - BOOK
AU  - Martin David
TI  - Geogrpahic information systems and their socieconomic applications
T2  - Geography Environment and Planning series,1-
SN  - 0415056977
U1  - U:(D6,9(B), N1 
PY  - 1991///
CY  - London
PB  - Routledge UK         
KW  - Geography-Modern
ER  -