@book { TheTriumphoftheFrontierUSIndianRemovalPolicyunterPrsidentJackson,
    title = "„The Triumph of the Frontier“? US Indian Removal Policy unter Präsident Jackson",
    author = "Stefan {Westkemper}",
    year = "2014",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    url = "https://www.hausarbeiten.de/document/272407"
}