@misc{OPUS4-27063,
  title     = {Die Vogelwarte : Band 50, Heft 1},
  booktitle = {Vogelwarte : Zeitschrift f{\"u}r Vogelkunde},
  volume    = {50},
  number    = {1},
  issn      = {0049-6650},
  type      = {periodicalpart},
  year        = {2012},
}