Salter, H. E. (ed.), Facsimiles of early charters in Oxford muniment rooms (Oxford: University Press, 1929)
Osm
Rich Jones, W. H. (ed.), Vetus registrum Sarisberiense, alias dictum Registrum S. Osmundi episcopi [The register of S. Osmund], 2 vols, Rerum Britannicarum medii aevi scriptores, no. 78 (London: Longman, 1883-1884)
Os
Salter, H. E. (ed.), Cartulary of Oseney Abbey, Oxford Historical Society, vols 89, 90, 91, 97, 98, 101 (Oxford: Clarendon Press, 1929-1936)
Orig
Rotulorum originalium in curia scaccarii abbreviatio, 2 vols (London: Geroge Eyre and Andrew Strahan, 1805-1810)
Ol
Oliver, George, Monasticon dioecesis Exoniensis (Exeter; London, 1846)