@article{HolzendorfZeissler1997,
  author    = {Holzendorf, Ulf and Zeißler, Fritz-Peter},
  title     = {Sch{\"u}lerinnen und Sch{\"u}ler bauen Musikinstrumente},
  year      = {1997},
  language  = {de}
}
@article{HolzendorfZeissler1997,
  author    = {Holzendorf, Ulf and Zeißler, Fritz-Peter},
  title     = {Sch{\"u}lerinnen und Sch{\"u}ler bauen einfache Musikinstrumente, Teil 2},
  year      = {1997},
  language  = {de}
}
@article{HaasHolzendorfKuenzeletal.2003,
  author    = {Haas, Maria and Holzendorf, Ulf and K{\"u}nzel, Matthias and Lenk, Michael and Meier, Bernd and Ordnung, M.},
  title     = {Wirtschaft-Technik-Haushalt},
  editor    = {Meier, Bernd and Schmid, Margarete},
  publisher = {Oldenbourg},
  address   = {M{\"u}nchen},
  isbn      = {3-486-88747-5},
  pages     = {232 S.},
  year      = {2003},
  language  = {de}
}
@article{MeierHolzendorfPieranski2004,
  author    = {Meier, Bernd and Holzendorf, Ulf and Pieranski, Wladyslaw},
  title     = {Strukturen soziotechnischer und sozio{\"o}konomischer Bildung an allgemeinbildenden Schulen},
  isbn      = {83-7395-116-4},
  year      = {2004},
  language  = {de}
}
@article{HolzendorfPieranski2005,
  author    = {Holzendorf, Ulf and Pieranski, Wladyslaw},
  title     = {Szkola wobec wymagan spoleczenstwa zmotoryzowanego},
  isbn      = {83-7395-116-4},
  year      = {2005},
  language  = {pl}
}
@article{MeierHolzendorf2005,
  author    = {Meier, Bernd and Holzendorf, Ulf},
  title     = {Aber bitte mit Sahne ...},
  year      = {2005},
  language  = {de}
}