@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}, }