Carl Ludwig Engel. (Helsinki : City of Helsinki, 1973)
The original German-language version was published by the Kunstbibliothek Berlin and the Museum of Finnish Architecture in connection with the Engel exhibition organized by the Museum of Finnish Architecture in Berlin in 1970. The Kunstbibliothek Berlin has made plates available for the Finnish, Swedish and English versions sponsored by the City of Helsinki.
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Keywords: Engel, Carl Ludwig