TY  - BOOK
AU  - Bernhardsen,Tor
TI  - Geographic information systems: an introduction 
SN  - 0471321923 (cloth)
PY  - 1999///
CY  - New York
PB  - John Wiley & Sons
KW  - Geographic information systems
N1  - Includes bibliographical references (p. 362 - 364) and index; Buku bacaan asas fakulti
ER  -