@book { GegenwartundZukunftdesHeilbderwesens,
    title = "Gegenwart und Zukunft des Heilbäderwesens",
    author = "Josef {Charvat}",
    year = "1973",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1069293"
}