TY  - BOOK
AU  - Decker, Drew
TI  - GIS data sources
SN  - 0-471-35505-4
U1  - 551.0113 
PY  - 2001///
CY  - New York
PB  - John Wiley
KW  - Geographic information systems-Information resources
N1  - Includes bibliographical references; Unique Sellers
ER  -