@unpublished{Wolf1989,
  author    = {Wolf, Norbert Richard},
  title     = {Die Darwinsche Theorie und die Sprachwissenschaften},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-41739},
  year      = {1989},
  abstract  = {No abstract available},
  language  = {de}
}