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Boundaries
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Society
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Iowa
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2002
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1. Iowa Block Groups 2002
2002. Geographic Data Technology, Inc. (GDT). Iowa Block Groups represents the U.S. Census block groups of Iowa. Environmental Systems Research Institute, Inc. (ESRI).
2. Iowa Tracts 2002
2002. Geographic Data Technology, Inc. (GDT). Iowa Tracts represents the U.S. Census tracts and block numbering areas (BNA) of Iowa. Environmental Systems Research Institute, Inc. (ESRI).