«St. Louis Arch»Arkivert 4. mars 2016 hos Wayback Machine. (PDF). Modern Steel Construction. American Institute of Steel Construction. 1963, 3 (4), s. 12–14.
«St. Louis Arch»Arkivert 4. mars 2016 hos Wayback Machine. (PDF). Modern Steel Construction. American Institute of Steel Construction. 1963, 3 (4), s. 12–14.