@book { GabeseineAlternative1937JahrdesTerrors,
    title = "Gab es eine Alternative? / 1937 - Jahr des Terrors",
    subtitle = "Band 4",
    author = "Wadim S. {Rogowin} and Hannelore {Georgi} and Harald {Schubärth}",
    year = "1998",
    publisher = "MEHRING Verlag",
    address = "Essen, Deutschland",
    url = "https://mehring.openpublishing.com/document/421257"
}