@book { EinDoktorinderBergweltBergromanDoppelband2RomaneineinemBand,
    title = "Ein Doktor in der Bergwelt: Bergroman Doppelband - 2 Romane in einem Band!",
    author = "Anna {Martach}",
    year = "2020",
    publisher = "Uksak E-Books",
    address = "Lengerich, Deutschland",
    url = "https://uksakebooks.grin.com/document/935270"
}