@article{Bos1992,
   title     = {Over de opzienbarende kolonisatie van de bosuil Strix aluco in Groningen en Drenthe},
   author    = {Bos, Johan},
   journal   = {Drentse Vogels},
   volume    = {5},
   pages     = {43--47},
   year      = {1992}
}