Blackton Colliery, Baldersdale, Teesdale (Cotherstone) - Source of Reference
| No. | Originator(s) | Date | Title | Notes |
|---|---|---|---|---|
| 1 | Wilcock, D | 1996 to 1998 | IRIS (Index Record for Industrial Sites) Survey Archive | 91068 |
| 2 | Nichol, R, The Bowes Museum | 1992 | The Baldersdale Survey Archive | |
| 3 | 1997 | Personal Comment Y. H. Warden | ||
| 4 | Wilcock, D | 1997 | Personal Comment by Don Wilcock 1997 | |
| 5 | Ordnance Survey | 1856 to 1865 | First Edition Ordnance Survey Map |