@book { FerdinandRudolphHasslerunddieUnitedStatesCoastSurvey,
    title = "Ferdinand Rudolph Hassler und die United States Coast Survey",
    author = "Lars {Langheinrich}",
    year = "2001",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640001231",
    url = "https://www.hausarbeiten.de/document/101710"
}