Bielefeld, Bert (Nombre personal)

Building projects in the European Union, c2005: t.p. (Bert Bielefeld) p. [7] (Dr. Bert Bielefeld, architect)

Bert Bielefeld & Partner, WWW site, November 5, 2015 (Prof. Dr.-Ing. Architekt Bert Bielefeld; located in Dortmund, Germany)

Basics Budgeting, 2014: portada (Bert Bielefeld) editor