@incollection{Ellgring1991,
  author    = {Ellgring, Johann Heinrich},
  title     = {Audiovisuell unterst{\"u}tzte Beobachtung},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-50347},
  publisher      = {Universit{\"a}t W{\"u}rzburg},
  year      = {1991},
  abstract  = {No abstract available},
  subject      = {Psychologie},
  language  = {de}
}