TY  - BOOK
AU  - Chrisman Nicholas
TI  - Exploring geographic information systems
SN  - 0 471 314250
U1  - U:(D6,9(B), N7;P2 
PY  - 2002///
CY  - New York
PB  - John Wiley U S A     
KW  - Geography-Modern
N1  - Bib p. 285-92
ER  -