@book { DieFrauenbildunginFrankfurtamMain,
    title = "Die Frauenbildung in Frankfurt am Main",
    author = "Maria {Rudolph}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1070506"
}