TY  - BOOK
AU  - HEYWOOD, Ian
TI  - Ana Introduction to geographical information systems: Ian Heywood,Sarah Cornelius and Steve Carver
SN  - 9780273722595
U1  - 910.285 22
PY  - 2011///
CY  - Harlow 
PB  - Pearson
N1  - includes reference and index
ER  -