TY  - BOOK
AU  - Sappington,Nancy,ed
TI  - Geography and GIS-Sustaining our world
T2  - ESRI Map Book ; 17
SN  - 1-58948-048-1
U1  - 910.285/Sa69g 
PY  - 2002///
CY  - [Redlands, Estados Unidos] 
PB  - ESRI
KW  - MAPAS DIGITALES
KW  - SISTEMAS DE INFORMACION GEOGRAFICA
ER  -