Legend (Chicago_historical_boundaries)
1850 (0)
|
1871 (1)
|
1893 (2)
|
1915 (3)
|
1945 (4)
|
1967 (5)
|
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1850 (0)
|
1871 (1)
|
1893 (2)
|
1915 (3)
|
1945 (4)
|
1967 (5)
|
