@article{Heyd2018,
  author    = {Thomas Heyd},
  title     = {Alexander von Humboldt y la unidad de la naturaleza},
  journal   = {HiN : Alexander von Humboldt im Netz ; International Review for Humboldtian Studies},
  volume    = {XVIII},
  number    = {35},
  pages     = {25 -- 37},
  year      = {2018},
}