@misc{Frahm2009,
  author    = {Jan-Peter Frahm},
  title     = {Nees von Esenbeck als Bryologe},
  booktitle = {53},
  series    = {Archive for Bryology},
  number    = {053},
  type      = {periodicalpart},
  pages     = {5},
  year        = {2009},
}