@article{BosBazuin2021Takkeling, title = {De Sperwer Accipiter nisus als broedvogel in de provincie Groningen in 2019 en 2020}, author = {Bos, Johan and Bazuin, Erik}, journal = {De Takkeling}, volume = {29}, number = {1}, pages = {85--92}, year = {2021} }