@book { JosefGielesStudentenbriefe19391942,
    title = "Josef Gieles: Studentenbriefe 1939-1942",
    author = "Heinrich {Kanz}",
    year = "2014",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-03064-8",
    url = "https://www.peterlang.com/document/1047649"
}