@book { GuillaumeApollinaireunddasRheinland,
    title = "Guillaume Apollinaire und das Rheinland",
    subtitle = "Mit einem Geleitwort von Michel Décaudin- Herausgeben von Eberhard Leube",
    author = "Ernst {Wolf}",
    year = "1989",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1076856"
}