* Schwarz, Hans-Peter. ''Konrad Adenauer: A German Politician and Statesman in a Period of War, Revolution and Reconstruction. Vol. 1: From the German Empire to the Federal Republic, 1876-1952.'' | * Schwarz, Hans-Peter. ''Konrad Adenauer: A German Politician and Statesman in a Period of War, Revolution and Reconstruction. Vol. 1: From the German Empire to the Federal Republic, 1876-1952.'' |