"860–880 Lake Shore Drive". City of Chicago Department of Planning and Development, Landmarks Division. 2003. Archived from the original on May 3, 2007. Retrieved May 14, 2007.
"860–880 Lake Shore Drive". City of Chicago Department of Planning and Development, Landmarks Division. 2003. Archived from the original on May 3, 2007. Retrieved May 14, 2007.