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GEOGRAPHIC INFORMATION SYSTEMS: TOWARD A GEO-RELATIONAL STRUCTURE Kenneth J. Dueker Portland State University School of Urban and Public Affairs P.O. Box 751
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Document Date: 2008-08-30 00:13:30
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GEOGRAPHIC INFORMATION SYSTEMS: TOWARD A GEO-RELATIONAL STRUCTURE Kenneth J. Dueker Portland State University School of Urban and Public Affairs P.O. Box 751