@book{verbindungen+loesungen+gemenge+in+elementarer+darstellung,
    author = {Herz, Walter i Ciamician, Giacomo},
    title = {Verbindungen, Lösungen, Gemenge : in elementarer Darstellung},
    address = {Stuttgart},
    publisher = {Verlag von Ferdinand Enke},
    date = {1913}
}