Burrough, Peter A. Principles of geographical information systems / Peter A. Burrough and Rachael A. McDonnell - Oxford ; New York : Oxford University Press, c1997. - xiii, 333 p. : ill. ; 25 cm. - Spatial information systems . ISBN: 0198233655 LCCN: Subjects--Topical Terms: Geographic information systemsGeography LC Class. No.: G70.212 / .B87 1997 Dewey Class. No.: 910.285 / B972p