@misc{HeinzmannWaitzmann2002,
  author    = {Roland Heinzmann and Michael Waitzmann},
  title     = {Rote Listen - Gradmesser unserer Umwelt},
  edition   = {2. Auflage Januar 2002},
  institution = {Extern},
  type      = {coursematerial},
  pages     = {3},
  year        = {2002},
}