@book{BalzerBeegerHallermannetal.2002,
  author    = {Werner Balzer and Helmut Beeger and Sigrun Hallermann and H. Kirsch and W. Nicklaus and B. Robel and D. Werner-Tokarski and Reinhard Herzig},
  title     = {Seydlitz Geographie 3 : Gymnasium Rheinland-Pfalz},
  isbn      = {3-507-52607-7},
  year      = {2002},
}