@article{BroscheitBuetowGehrkeetal.1994,
  author    = {Frank Broscheit and Heike B{\"u}tow and Albrecht Gehrke and Gert Jahn and Christoph J{\"u}rgens and Karl-Heinz Kißner and Werner Klohn and Wolfgang Knitschky and Franz-Peter Mager and Klaus Maier and Wolfgang M{\"u}hlberger and Wolfgang M{\"u}lders and Beate Rappen-R{\"o}hlen and Karl Heinz Reinhardt and Marianne Schmidt and Kurt-Dietmar Schmidtke and Hartmut Volkmann and J{\"u}rgen Wetzel},
  title     = {Seydlitz Erdkunde 1 : Ausgabe f{\"u}r Realschulen in Nordrhein-Westfalen},
  year      = {1994},
}