@book{BalzerBeegerHallermannetal.2001,
  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 2 : Gymnasium Rheinland-Pfalz, Saarland},
  isbn      = {3-507-52606-9},
  year      = {2001},
}