@misc{OPUS4-27053,
  title     = {Die Vogelwarte : Band 47, Heft 4},
  booktitle = {Vogelwarte : Zeitschrift f{\"u}r Vogelkunde},
  volume    = {47},
  number    = {4},
  issn      = {0049-6650},
  type      = {periodicalpart},
  year        = {2009},
}