@misc{Frahm2006,
  author    = {Jan-Peter Frahm},
  title     = {Die Moosflora von Rolandseck},
  booktitle = {12},
  series    = {Archive for Bryology},
  number    = {012},
  type      = {periodicalpart},
  pages     = {7},
  year        = {2006},
}