TY  - BOOK
AU  - Heywood,Ian
AU  - Cornelius,Sarah
AU  - Carver,Steve
TI  - Introduction to Geographical Information Systems 
SN  - 9780273722595
PY  - 2011///
PB  - Prentice Hall
UR  - http://lib.myilibrary.com?id=327527
ER  -