@book{die+entloehnungsmethoden+in+der+berliner+feinmechanik,
    author = {Heiss, Clemens},
    title = {Die Entlöhnungsmethoden in der Berliner Feinmechanik},
    address = {Berlin},
    publisher = {Verlag von Leonhard Simion Nf.},
    date = {1909}
}