DescriptionUnited States Congressional Districts in Illinois, 1967-1972.png
English: These are the United States Congressional District boundaries for the state of Illinois from 1967-1972.
GIS shapefile data accessed from Jeffrey B. Lewis, Brandon DeVine, Lincoln Pitcher, and Kenneth C. Martis. (2013) Digital Boundary Definitions of United States Congressional Districts, 1789-2012.
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Captions
Statewide boundaries for United States congressional districts in Illinois, 1967-1972