@article{Trusch2020,
  author    = {Robert Trusch},
  title     = {Karl Ratzel †},
  journal   = {Carolinea},
  series    = {18. M{\"a}rz 1928 bis 1. November 2020},
  volume    = {78},
  pages     = {203 -- 207},
  doi       = {10.57962/regionalia-20794},
  year      = {2020},
}