Church Fabric Survey database
2013
Sources for Harpenden: St Nicholas
CWGC
Commonwealth War Graves Commission
2016
Keltek Trust
Exterior image of 632245 St Nicholas, Harpenden
2017, August 13
Keltek Trust
Interior image of 632245 St Nicholas, Harpenden
2014, June 26
Church Buildings Council
Church Bells
2019
Church of England
A Church Near You
2021
ICBS
Incorporated Church Building Society Archive
1817-1989