Grey Tower, North Road, Durham (Durham City) - Source of Reference
| No. | Originator(s) | Date | Title | Notes |
|---|---|---|---|---|
| 1 | Ordnance Survey | Ordnance Survey Archaeology Card AKA National Non-Intensive Archaeological Record (England) | NZ24SE M | |
| 2 | Department of Environment, English Heritage, Historic Buildings and Monuments Commission | 1950 | List of buildings of special architectural or historic interest, also known as "Greenbacks" | Ref 4/290, page 152 |
| 3 | Ryder, P | 2005 to 2006 | Medieval and Sub-Medieval Defensible Buildings in County Durham | Gazetteer 6, page 1 |
| 4 | Department of Archaeology Durham University | 1988 to 1991 | Durham City Archaeological Conservation Management Project Archive | |
| 5 | Department of Archaeology Durham University | 1991 | Urban Archaeological Database | |
| 6 | Grey Tower, North Rd, Durham City (2004) | |||
| 7 | Ryder, P | Grey Tower, North Road, Durham | ||
| 8 | Ryder, P | Grey Tower, North Road, Durham |