@book { DiedeutschepolitischeEmigrationnachAmerika18151848,
    title = "Die deutsche politische Emigration nach Amerika 1815-1848",
    author = "Ulrich {Klemke}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1103100"
}