NP: NP, 1862-1941. First edition. Hardcover. The Havestadt & Contag engineering/architecture firm was founded in the early 1880's by Max Contag and Christian Havestadt. The company became famous for large projects such as the building of the Teltowkanal, expansion of the Rhein river between Wesel and Bodensee, the Klodnitzkanal, Bonner.....
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