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Chicago Loop - Wikipedia
The Loop (CTA) - Wikipedia
What is the Loop? - Loop Chicago
Chicago Loop - Wikiwand
The Loop - Encyclopedia of Chicago
Discover The Historic Charm Of Chicago Loop
Chicago Loop - Simple English Wikipedia, the free encyclopedia
Chicago/Loop – Travel guide at Wikivoyage
The Loop | Chicago, Map, & Facts | Britannica
Then and Now: A Brief History of the Chicago ‘L’