BIBCYT http://bibcyt.ucla.edu.ve/cgi-win/be_alex.exe?Ultimo&Nombrebd=BIBCYT UCLA - Biblioteca de Ciencias y Tecnologia Felix Morales Bueno Shekhar, Shashi shekhar@cs.umn.edu P Principal Coyle, Mark mcoyle@us.oracle.edu P Principal Goyal, Brajesh brajesh@cs.umn.edu P Principal Liu, Duen-Ren dliu@iim.nctu.edu.tw P Principal Sarkar, Shyamsundar sarkar@informix.com P Principal Data Models in Geographic Information Systems. Vol: 40 pp.103-111.; 28cm.; il.