@article{Ette2012,
  author    = {Ottmar Ette},
  title     = {Alexander von Humboldt: Wissenschaft im Feld},
  journal   = {Alexander von Humboldt im Netz ; international review for Humboldtian studies},
  series    = {Transareale Wissenschaftsfelder in den Tropen},
  volume    = {XII},
  number    = {23},
  pages     = {9 -- 25},
  year      = {2012},
}