@misc{Lehner2008,
  author    = {Franz Lehner},
  title     = {Wie gross ist das Ruhrgebiet tats{\"a}chlich?},
  booktitle = {Westdeutsche Allgemeine Zeitung},
  number    = {40},
  type      = {contributiontoperiodical},
  pages     = {WBH\_1},
  year        = {2008},
}