@article{Biermann2012,
  author    = {Kurt-Reinhard Biermann},
  title     = {War Alexander von Humboldt ein "Freiherr" (oder "Baron")?},
  journal   = {Alexander von Humboldt im Netz ; international review for Humboldtian studies},
  volume    = {XII},
  number    = {23},
  pages     = {68 -- 71},
  year      = {2012},
}