Johnston AW. Notes on the Earl’s Bú (or Bordland) at Orphir, Orkney, called Örfjara in the Sagas, and on the Remains of the round church there. PSAS [Internet]. 1903 Nov. 30 [cited 2024 Apr. 25];37:16-31. Available from: https://journals.socantscot.org/index.php/psas/article/view/6864