Chicago Spire
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Walton, William / Diehm, Darren / Burns, Joseph / Sarabia, Fernando / Browne, Garret / Provanzana, Suzanne (2008): Geotechnical Engineering of the 600 m Chicago Spire. Vorgetragen bei: 17th IABSE Congress: Creating and Renewing Urban Structures – Tall Buildings, Bridges and Infrastructure, Chicago, USA, 17-19 September 2008, S. 614-615.
https://doi.org/10.2749/222137908796294243
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Dupré, Judith / Smith, Adrian (2008): Skyscrapers. A History of the World's Most Extraordinary Buildings. 2. Ausgabe, Black Dog & Leventhal Publishers, Inc., New York (USA), ISBN 978-1-57912-787-9, S. 140-141.
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Tomasetti, Richard / Burns, Joseph / Scarangello, Tom / McLean, Dave / Browne, Garret / Steele, Nicholas (2008): Structural Engineering of the 600 m Chicago Spire. Vorgetragen bei: 17th IABSE Congress: Creating and Renewing Urban Structures – Tall Buildings, Bridges and Infrastructure, Chicago, USA, 17-19 September 2008, S. 138-139.
https://doi.org/10.2749/222137908796292029