@incollection{glenn1986notes,
  address = {Nottingham},
  author = {Glenn, John},
  booktitle = {England in the thirteenth century. Proceedings of the 1984 Harlaxton Symposium},
  editor = {Ormrod, W. M.},
  interhash = {e64f07805cd1a14c8b54d44b93fb6b46},
  intrahash = {246f62d41dc4dbf6a11acc50a8633483},
  pages = {60-63},
  title = {Notes on the Mappa Mundi in Hereford Cathedral},
  year = 1986
}

@article{edson1993oldest,
  author = {Edson, Evelyn},
  interhash = {a65f19de47e20b7e3e23ede06bd9bc22},
  intrahash = {3c1cfe7e0cc6cee9cd14864eefa642b5},
  journal = {Ancient World},
  pages = {169-184},
  title = {The Oldest World Maps: Classical Sources of three VIIIth Century Mappaemundi},
  volume = 24,
  year = 1993
}