@book{Laack2000,
  author    = {Laack, Walter van},
  title     = {Key to Eternity / Walter van Laack. [Transl. by Anneliese Wolstenholme]},
  publisher = {van Laack},
  address   = {Aachen},
  isbn      = {978-3-8311-0344-7},
  pages     = {256 S.},
  year      = {2000},
  language  = {en}
}
@book{Laack2000,
  author    = {Laack, Walter van},
  title     = {Pl{\"a}doyer f{\"u}r ein Leben nach dem Tod und eine etwas andere Sicht der Welt},
  edition   = {2., komplett {\"u}berarb. Aufl.},
  publisher = {van Laack},
  address   = {Aachen},
  isbn      = {978-3-89811-818-7},
  pages     = {447 S. : graph. Darst.},
  year      = {2000},
  language  = {de}
}
@book{Laack2000,
  author    = {Laack, Walter van},
  title     = {Nobody ever dies! / 1. ed.},
  publisher = {van Laack},
  address   = {Aachen},
  isbn      = {978-3-936624-03-8},
  pages     = {272 S.},
  year      = {2000},
  language  = {en}
}
@book{Laack1999,
  author    = {Laack, Walter van},
  title     = {Der Schl{\"u}ssel zur Ewigkeit},
  publisher = {van Laack},
  address   = {Aachen},
  isbn      = {978-3-9805239-4-3},
  pages     = {285 S.},
  year      = {1999},
  language  = {de}
}
@book{Laack1982,
  author    = {Laack, Walter van},
  title     = {Experimentelle Untersuchungen {\"u}ber die Wirksamkeit von Schienbeinschonern im Fußballsport},
  address   = {Aachen},
  pages     = {187 S. : Ill.; graph. Darst.},
  year      = {1982},
  language  = {de}
}