Houghall Colliery (Durham City) - Source of Reference
| No. | Originator(s) | Date | Title | Notes |
|---|---|---|---|---|
| 1 | Ordnance Survey | 1856 to 1865 | First Edition Ordnance Survey Map | 1856 - 1865 |
| 2 | Emery, N | 1991 | Survey and excavation in County Durham 1990 | |
| 3 | Private Individual | 05-Jan-2022 | Houghall Colliery, Local Listing Form | Local Heritage List proforma |