@book { DiePlastverarbeitungderDDRundihrUmfeld,
    title = "Die Plastverarbeitung der DDR und ihr Umfeld",
    author = "Henning {Diederichs}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1096177"
}