Kind(eren):
Genealogy of the House of Bigod of Norfolk †
http://trees.ancestry.com/rd?f=document&guid=2075ab5d-a32e-4a06-ba1c-246529eeedfd&tid=4883085&pid=2288
Roger 'the Sheriff' le Bigod †
http://trees.ancestry.com/rd?f=document&guid=968f380a-bd90-460f-b428-3b5e1fb9a464&tid=4883085&pid=2288
Genealogy of the House of le Bigod †
http://trees.ancestry.com/rd?f=document&guid=ec68987b-dd5a-4212-be07-dc4e6d36e7b6&tid=4883085&pid=2288
http://trees.ancestry.com/pt/AMTCitationRedir.aspx?tid=4883085&pid=2288/ Ancestry.com