@misc{OPUS4-13384,
  title     = {Baden-W{\"u}rttembergs Natura 2000-Gebiete: Oberes Donautal zwischen Beuron und Sigmaringen},
  series    = {Natura 2000 in Baden-W{\"u}rttemberg},
  number    = {13},
  year      = {2009}
}