@book{MetteCzechKuenzeletal.2001,
  author    = {Mette, Dieter and Czech, Olaf and K{\"u}nzel, Matthias and Meier, Bernd and Meschenmoser, Helmut and Stopperka, Ulf and Traue, Heidi},
  title     = {Arbeitslehre aktuell : Lehrermaterialien Wirtschaft},
  publisher = {Oldenbourg Schulbuchverl. GmbH},
  address   = {M{\"u}nchen},
  isbn      = {978-3-637-88735-0},
  pages     = {192 S.},
  year      = {2001},
  language  = {de}
}
@book{MetteCzechKuenzeletal.2001,
  author    = {Mette, Dieter and Czech, Olaf and K{\"u}nzel, Matthias and Meier, Bernd and Meschenmoser, Helmut and Stopperka, Ulf and Traue, Heidi},
  title     = {Arbeitslehre aktuell : Lehrermaterialien Technik},
  publisher = {Oldenbourg},
  address   = {M{\"u}nchen},
  isbn      = {978-3-637-88764-0},
  pages     = {162 S.},
  year      = {2001},
  language  = {de}
}