TY  - BOOK
AU  - Maguire,D.J.
AU  - Goodchild,Michael F.
AU  - Rhind,David
TI  - Geographical information systems: principles and applications 
SN  - 0582056616
PY  - 1991///
CY  - Harlow, Essex
PB  - Longman Scientific & Technical
KW  - Geographic information systems
N1  - Includes bibliographical references and indexes; vol. 1; Principles --; vol. 2; Applications
ER  -