@book { DieepochalbedeutsamenLehrplneBayernsdes20Jahrhunderts,
    title = "Die epochal bedeutsamen Lehrpläne Bayerns des 20. Jahrhunderts",
    author = "Stephanie B. {Bierner-Utschick}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1094198"
}