@book{Laack2002,
  author    = {Laack, Walter van},
  title     = {Eine bessere Geschichte unserer Welt / Bd. 3. Der Tod},
  publisher = {van Laack},
  address   = {Aachen},
  isbn      = {978-3-8311-3581-3},
  pages     = {248 S.},
  year      = {2002},
  language  = {de}
}
@book{Laack2002,
  author    = {Laack, Walter van},
  title     = {A better history of our world / Vol. 2. Life},
  publisher = {van Laack},
  address   = {Aachen},
  isbn      = {978-3-8311-2597-5},
  pages     = {236 S.},
  year      = {2002},
  language  = {en}
}