@book { DieAachenerHeiligtumsfahrtim19Jahrhundert,
    title = "Die Aachener Heiligtumsfahrt im 19. Jahrhundert",
    author = "Volker {Speth}",
    year = "2024",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b21626",
    url = "https://www.peterlang.com/document/1389546"
}