@incollection{potthast1990iohannes,
  address = {Rom},
  author = {Potthast, August},
  booktitle = {Repertorium fontium historiae medii aevi},
  editor = {Potthast, August},
  interhash = {0063babd00642df5c019e3276fd79828},
  intrahash = {8d27ec324f5886f742f3e39fa36e5378},
  pages = 429,
  title = {Iohannes presbyter Wirceburgensis},
  volume = 6,
  year = 1990
}