@article{Erzner2013,
  author    = {Frank Erzner},
  title     = {Schulb{\"u}cher f{\"u}r den Geographieunterricht},
  journal   = {Potsdamer geographische Praxis},
  number    = {6},
  pages     = {55 -- 62},
  year      = {2013},
}