Milepost, A689, west of Park Level Mine, Killhope (Killhope) - 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: 1842, 8, 108 |
| 2 | Milepost, A689, west of Park Level Mine, Killhope | |||
| 3 | Milepost, A689, west of Park Level Mine | |||
| 4 | Milepost, A689, west of Park Level Mine | |||
| 5 | Durham County Council | 2016 | Milepost, A689, west of Park Level Mine, Killhope |