@article{Pufelska2012,
  author    = {Pufelska, Agnieszka},
  title     = {Between bourgeoisie and natural science the Danzig research society as model for the Berlin society of friends of natural history},
  isbn      = {978-83-7842-018-7},
  year      = {2012},
  language  = {en}
}
@article{Pufelska2013,
  author    = {Pufelska, Agnieszka},
  title     = {Polen},
  isbn      = {978-3-8353-1255-5},
  year      = {2013},
  language  = {de}
}