Working in the Dry: Cofferdams, In-River Construction, and the United States Army Corps of Engineers, by Patrick O'Bannon . Pittsburgh, PA: U.S. Army Corps of Engineers, Pittsburgh District, 2009; 184 pp.; paperbound.
Working in the Dry: Cofferdams, In-River Construction, and the United States Army Corps of Engineers, by Patrick O'Bannon . Pittsburgh, PA: U.S. Army Corps of Engineers, Pittsburgh District, 2009; 184 pp.; paperbound.
