@book { DaswestlicheSamland,
    title = "Das westliche Samland",
    subtitle = "Nachdruck der Ausgabe von 1920- Band I + II",
    author = " {Anonym}",
    year = "2001",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1093573"
}