@book{Laack2005,
  author    = {Laack, Walter van},
  title     = {Mit Logik die Welt begreifen},
  publisher = {van Laack},
  address   = {Aachen},
  isbn      = {978-3-936624-07-6},
  pages     = {380 S. : Ill., graph. Darst.},
  year      = {2005},
  language  = {de}
}