| Historical Source |
| U |
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United Airlines Flight Crew at Midway Airport, c.1940s
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United Airlines flight crew at Midway Airport, c.1940s.
The Electronic Encyclopedia of Chicago © 2005 Chicago Historical Society.
The Encyclopedia of Chicago © 2004 The Newberry Library. All Rights Reserved. Portions are copyrighted by other institutions and individuals. Additional information on copyright and permissions.
The Encyclopedia of Chicago © 2004 The Newberry Library. All Rights Reserved. Portions are copyrighted by other institutions and individuals. Additional information on copyright and permissions.