@book { UnterrichtsbesuchImperialismusHereroaufstand,
    title = "Unterrichtsbesuch Imperialismus Hereroaufstand ",
    author = "Nina {Hollstein}",
    year = "2012",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656329510",
    url = "https://www.hausarbeiten.de/document/206035"
}