@article{Bos2018Takkeling,
   title     = {De Sperwer Accipiter nisus als broedvogel in de provincie Groningen in 2017},
   author    = {Bos, Johan},
   journal   = {De Takkeling},
   volume    = {26},
   number    = {2},
   pages     = {149--153},
   year      = {2018}
}