@book{ title = "Streng geheim!", author = "Kippenhahn, Rudolf", year = "2002", publisher = "Rowohlt-Taschenbuch-Verl.", address = "Reinbek bei Hamburg", edition = "Orig.-Ausg", title = "Wie man Botschaften verschlüsselt und Zahlencodes knackt", language = "ger", howpublished = "print", isbn = "3499211645", keywords = "Jugendsachbuch,Geheimschrift,Kindersachbuch", pages = "24 cm", series = "Array, 21164", }