Calendar of Papal Registers Relating To Great Britain and Ireland: Volume 9, 1431-1447. Originally published by His Majesty's Stationery Office, London, 1912.
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'Bibliography', in Calendar of Papal Registers Relating To Great Britain and Ireland: Volume 9, 1431-1447, ed. J A Twemlow( London, 1912), British History Online https://prod.british-history.ac.uk/cal-papal-registers/brit-ie/vol9/vii-viii [accessed 6 November 2024].
'Bibliography', in Calendar of Papal Registers Relating To Great Britain and Ireland: Volume 9, 1431-1447. Edited by J A Twemlow( London, 1912), British History Online, accessed November 6, 2024, https://prod.british-history.ac.uk/cal-papal-registers/brit-ie/vol9/vii-viii.
"Bibliography". Calendar of Papal Registers Relating To Great Britain and Ireland: Volume 9, 1431-1447. Ed. J A Twemlow(London, 1912), , British History Online. Web. 6 November 2024. https://prod.british-history.ac.uk/cal-papal-registers/brit-ie/vol9/vii-viii.