@book { RudolfHermannErichSeeberg,
    title = "Rudolf Hermann – Erich Seeberg",
    subtitle = "Briefwechsel 1920-1945",
    author = "Jörg {Ohlemacher} and Arnold {Wiebel}",
    year = "2003",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1095633"
}