@article{Gatter2007,
  author    = {Wulf Gatter},
  title     = {Langzeit-Populationsdynamik und R{\"u}ckgang des Feldsperlings Passer montanus in Baden-W{\"u}rttemberg},
  journal   = {Vogelwarte : Zeitschrift f{\"u}r Vogelkunde},
  volume    = {45},
  number    = {1},
  pages     = {109 -- 118},
  year      = {2007},
}