TY  - DATA
AU  - Bernhardsen,Tor
TI  - Geographic information systems: an introduction 
SN  - 0471419680 (cloth : alk. paper)
U1  - 910.285 21
PY  - 2002///
CY  - New York, NY
PB  - Wiley
KW  - Geographic information systems
N1  - Includes bibliographical references (p. 413-417)
ER  -