@book { DerDeutscheRundfunkder1TschechoslowakischenRepublik,
    title = "Der Deutsche Rundfunk der 1. Tschechoslowakischen Republik",
    author = "Eckhard {Jirgens}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1100076"
}