@article{Bos2015Takkeling,
   title     = {De Sperwer Accipiter nisus als broedvogel in de provincie Groningen in 2014},
   author    = {Bos, Johan},
   journal   = {De Takkeling},
   volume    = {23},
   number    = {1},
   pages     = {86--88},
   year      = {2015}
}