6a The College, Durham City (Durham City) - Source of Reference
| No. | Originator(s) | Date | Title | Notes |
|---|---|---|---|---|
| 1 | Department of Environment, English Heritage, Historic Buildings and Monuments Commission | 1950 | List of buildings of special architectural or historic interest, also known as "Greenbacks" | LB Volume, Map & Item: 1914, 16, 82 |
| 2 | 6a The College, Durham | |||
| 3 | 6a The College, Durham | |||
| 4 | 6a The College | |||
| 5 | Ordnance Survey | Ordnance Survey Archaeology Card AKA National Non-Intensive Archaeological Record (England) | NZ 24 SE 69 |