Alternative view of workshop group six members Gerhard Cordes, Jürgen Ruttkamp, Christian Diringer, Dr. Michael Hartung at the International Management Conference with the Bilfinger Berger Group, November 8, 2002, A3054-00365. Missouri Historical Society Library and Research Center.

Alternative view of workshop group six members Gerhard Cordes, Jürgen Ruttkamp, Christian Diringer, Dr. Michael Hartung at the International Management Conference with the Bilfinger Berger Group, November 8, 2002, A3054-00365. Missouri Historical Society Library and Research Center. https://mohistory.mobiusconsortium.org/repositories/2/digital_objects/16866 Accessed September 20, 2024.