@article{KniprathStier2008,
  author    = {Ernst Kniprath and Susanne Stier},
  title     = {Zur Unterseitenf{\"a}rbung einer Population der Schleiereule Tyto alba "guttata" in S{\"u}dniedersachsen},
  journal   = {Vogelwarte : Zeitschrift f{\"u}r Vogelkunde},
  volume    = {44},
  number    = {4},
  pages     = {233 -- 234},
  year      = {2008},
}