@book{DoelerHaagGenser2009,
  author    = {Hans-Peter D{\"o}ler and Cornelie Haag and Joachim Genser},
  title     = {Magerrasen / [Bearb.: Landesanstalt f{\"u}r Umweltschutz Baden-W{\"u}rttemberg, Abteilung 2, Referat 25. Text: Hans-Peter D{\"o}ler ...]},
  year      = {2009},
}