TY - BOOK AU - Goodchild Michael F AU - Longley Paul A AU - Maguire David J AU - Rhind David W TI - Geographical information systems SN - 0-471-32182-6 U1 - 005.7 PY - 1999/// CY - New York PB - John Wiley KW - Geographical information systems N1 - v1: Principles and technical issues ER -