Title: Engineering America
Subjects: Engineering, Roebling, john augustus, 1805-1869, Civil engineers, Germany, biography, Suspension bridges, Bridges, history, German americans, Immigrants, united states, United states, biography, Biography, History, Railroad bridges, German Americans, Immigrants, Ingénieurs civils, Biographies, Ponts suspendus, Histoire, Ponts-rails, Américains d'origine allemande