@book{ZirfasKrebsKlepackietal.2021, author = {J{\"o}rg Zirfas and Moritz Krebs and Leopold Klepacki and Daniel Burghardt and Diana Lohwasser and Juliane Noack Napoles and Tanja Klepacki}, title = {Das 20. Jahrhundert}, isbn = {978-3-657-79129-3}, year = {2021}, }