@book{SchneiderMusterWaebs1999,
  author    = {Kordula Schneider and Hannelore Muster-W{\"a}bs},
  title     = {Vom Lernfeld zur Lernsituation},
  edition   = {1. Aufl.},
  isbn      = {3-441-5145-9},
  year      = {1999},
}