"Fotografia dell'autore. Crowell-Collier building in Springfield, Ohio (2011) By Cindy Funk - Crowell Collier Building, CC BY 2.0, <a href=""https://commons.wikimedia.org/w/index.php?curid=25340811"" rel=""nofollow"" target=""_top"">https://commons.wikimedia.org/w/index.php?curid=25340811</a>"
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