@book{OPUS4-18305,
  title     = {Physik : Kl. 7, Arbeitsh., Regelschule Th{\"u}ringen},
  editor    = {Mikelskis, Helmut and Wilke, Hans-Joachim},
  publisher = {Cornelsen},
  address   = {Berlin},
  isbn      = {3-06-020738-0},
  pages     = {32 S.},
  year      = {2001},
  language  = {de}
}
@book{OPUS4-18283,
  title     = {Physik plus : Kl. 9, [Hauptbd.], Sek. 1 Sachsen},
  editor    = {Mikelskis, Helmut and Wilke, Hans-Joachim},
  publisher = {Cornelsen},
  address   = {Berlin},
  isbn      = {3-06-020947-2},
  pages     = {120 S.},
  year      = {2001},
  language  = {de}
}