SOURCE Knut Stegmann: Early Concrete Constructions in Germany – A Review with Special Regard to the Building Company Dyckerhoff & Widmann. – In: Karl-Eugen Kurrer, Werner Lorenz and Volker Wetzk (eds.): Proceedings of the Third International Congress on Construction History, Brandenburg University of Technology Cottbus. Volume 3. – Berlin: Neunplus1 2009, pp. 1371–1378. (ISBN 978-3936033311) MORE ON THIS TOPIC http://architexts.net/stegmann/dywidag-building-company CONTACT THE AUTHOR http://architexts.net/contact