@book { DieWestlichePostundderErsteWeltkrieg,
    title = "Die «Westliche Post»und der Erste Weltkrieg",
    author = "Ingeborg {Gundlach}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1098260"
}