TY  - BOOK
AU  - Hearnshaw Hilary M Ed.
AU  -  Unwin David J Ed.
TI  - Visualization in geographical information systems
T2  - Association for geographic information
SN  - 04719944351
U1  - U:(D6,9(B), N4 
PY  - 1994///
CY  - Chrichester
PB  - John Wiely         
KW  - Geography-Modern
ER  -