OkC

http://www.city-data.com/forum/oklahoma-city/1300911-devon-tower-construction-news-pics-7.html

http://hollybaumannphotography.wordpress.com/2012/04/24/aerial-photos-devon-tower-oklahoma-city-commercial-photographer

http://www.imaginativeamerica.com/tag/downtown/page/2

http://archrecord.construction.com/projects/portfolio/2012/10/devon-energy-center-pickard-chilton.asp

http://www.news9.com/story/19795236/devon-energy-to-consolidate-all-us-operations-to-okc

http://dilemmaxdotnet.files.wordpress.com/2012/04/oklahoma-city.jpg

http://www.city-data.com/forum/oklahoma-city/1300911-devon-tower-construction-news-pics-3.html

http://spitballarmy.com/?p=7024

http://www.skyscrapercity.com/showthread.php?t=690618&page=31