TY  - GEN
AU  - Marble, Duane F
AU  - Calkins, Hugh W
AU  - Peuquet, Donna J
TI  - Basic readings in geographic information systems
SN  - 0913913006
U1  - 910 
PY  - 1984///
CY  - NY
PB  - SPAD Systems
KW  - Geography
N1  - D/Miss I. Fernando
ER  -