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Die Rolle des Eisens in der historischen Architektur der zweiten Hälfte des 19. Jahrhunderts | = The role of iron in the historic architecture in the second half of the 19th century | Symposium on the Role of Iron in the Historical Architecture in the Second Half of the Nineteenth Century / 1981 / Bad Ems; ICOMOS / Deutsches Nationalkomitee | 1982 |