@book{MetteCzechKuenzeletal.2000,
  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 : Arbeitsheft Technik 1},
  publisher = {Oldenbourg-Schulbuchverl.},
  address   = {M{\"u}nchen},
  isbn      = {978-3-637-88765-7},
  pages     = {32 S.},
  year      = {2000},
  language  = {de}
}
@book{MetteCzechKuenzeletal.2000,
  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 : Arbeitsheft Technik 2},
  publisher = {Oldenbourg},
  address   = {M{\"u}nchen},
  isbn      = {978-3-637-88763-3},
  pages     = {32 S.},
  year      = {2000},
  language  = {de}
}