@article{Drews1998,
  author    = {Drews, Ursula},
  title     = {Freiarbeit},
  year      = {1998},
  language  = {de}
}
@article{DrewsDurdel1998,
  author    = {Drews, Ursula and Durdel, Anja},
  title     = {Offene Schule - offener Unterricht},
  year      = {1998},
  language  = {de}
}
@article{Drews1998,
  author    = {Drews, Ursula},
  title     = {Unterrichten in den Klassen 5 und 6 der Grundschule : (kein) Problem ? : zur Lern- und Lebenssituation der Kinder in 5. und 6. Klasse},
  year      = {1998},
  language  = {de}
}
@article{Drews1998,
  author    = {Drews, Ursula},
  title     = {Wenn Lehrer an Grenzen kommen},
  year      = {1998},
  language  = {de}
}