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"Cortland Street Drawbridge". City of Chicago Department of Planning and Development, Landmarks Division. Archived from the original on 2008-06-21. Retrieved 2008-07-16.
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"Chicago - 25 Years Closed". Trolleybus Magazine. No. 222. United Kingdom: National Trolleybus Association. November–December 1998. p. 132. ISSN0266-7452.