@book { DasBrodesReichsprsidenten19191934,
    title = "Das Büro des Reichspräsidenten 1919-1934",
    author = "Klaus-Dieter {Weber}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1091448"
}