@book{ title = "Leichs, Sangsprüche, Lieder", author = "Heinrich,Stackmann, Karl,Bertau, Karl", year = "1981-", publisher = "Vandenhoeck & Ruprecht", address = "Göttingen", language = "ger","gmh", howpublished = "print", keywords = "Heinrich,Lyrik", series = "Array, Folge 3, ...", }