@incollection{Weller2019,
  author    = {Christoph Weller},
  title     = {Bundesministerien},
  booktitle = {Handbuch zur deutschen Außenpolitik},
  editor    = {Siegmar Schmidt and Gunther Hellmann and Reinhard Wolf},
  isbn      = {978-3-531-13652-3},
  year      = {2019},
}