@book{Riekert1998,
  editor    = {Wolf-Fritz Riekert and Klaus Tochtermann},
  title     = {{Hypermedia im Umweltschutz}},
  year      = 1998,
  month = 4,
  series ={Umweltinformatik aktuell},
  volume = {17},
  publisher = {Metropolis-Verlag},
  address   = {Marburg},
  isbn = {3-89518-191-9},
}