@book { GeorgBernhard,
    title = "Georg Bernhard",
    subtitle = "Die politische Haltung des Chefredakteurs der Vossischen Zeitung 1918 - 1930",
    author = "Michael {Klein}",
    year = "1999",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1088266"
}