@misc{OPUS4-13369,
  title     = {Daten zur Umwelt - Umweltindikatoren Baden-W{\"u}rttemberg. Stand der Daten: Oktober 2009},
  booktitle = {Daten zur Umwelt - Umweltindikatoren Baden-W{\"u}rttemberg},
  volume    = {2009},
  url       = {http://www.lubw.baden-wuerttemberg.de},
  type      = {periodicalpart},
  pages     = {6},
  year        = {2009},
}