@book{ZieglerEickmansSchmitzetal.2018,
  author    = {Ziegler, Evelyn and Eickmans, Heinz and Schmitz, Ulrich and Uslucan, Haci-Halil and Gehne, David H. and Kurtenbach, Sebastian and M{\"u}hlan-Meyer, Tirza and Wachendorff, Irmi},
  title     = {Metropolenzeichen. Atlas zur visuellen Mehrsprachigkeit der Metropole Ruhr},
  publisher = {Universit{\"a}tsverlag Rhein-Ruhr},
  address   = {Duisburg},
  isbn      = {978-3-95605-038-1},
  year      = {2018},
  language  = {de}
}