Source details: (Book)
Earldom of Gloucester Charters: the Charters and Scribes of the Earls and Countesses of Gloucester to A.D. 1217
Robert B. Patterson (ed.)
Clarendon Press (Oxford 1973)
Contains Latin transcriptions of thirty two charters of Margam Abbey, including the foundation charter.
Sites linked to this source
Margam Abbey, Neath Port Talbot