TY  - BOOK
AU  - HEYWOOD,Ian
TI  - An Introduction to Geographical Information Systems
SN  - 978-0-273-72259-5(pbk.)
AV  - 910.285 
U1  - 910.285 22
PY  - 2011///
CY  - New-York 
PB  - Prentice Hall
KW  - Geography
N1  - Includes References and Index
ER  -