@book { MaterialienzurLandeskundederSowjetunion,
    title = "Materialien zur Landeskunde der Sowjetunion",
    author = "Rupprecht {Baur}",
    year = "1983",
    publisher = "Biblion",
    address = ", Germany",
    doi = "10.3726/b13010",
    url = "https://www.peterlang.com/document/1067348"
}