Antiquarian Horological Society
AHS Turret Clock database
2015
Sources for Durham Cathedral
Mike Quinn (geograph.org)
Exterior image of 613001 Durham Cathedral
July 2008
Mike Quinn (geograph.org)
Exterior image of 613001 Durham Cathedral
July 2008
Keltek Trust
Exterior image of 613001 Durham Cathedral
2013, August 24
Keltek Trust
Interior image of 613001 Durham Cathedral
2011, August 09
Church Buildings Council
Church Bells
2019
James Miles
Bell frames of historic importance
2019
Church of England
A Church Near You
2021