StatsFull Cave Registry entry
Not clear who owns these sites or what the access situation is. Whole of Bradwell Dale is an SSSI, including these entrances.
- Buckley, A.L. (1974), Berton Pingles Pipe Vein., DCA N/L No.21., Derbyshire Caving Association.
- Drakeley, K. (1978), DCA N/L No.37., Derbyshire Caving Association.
- Taylor, J. (2000), Descent No. 155., p.8., Wild Places Publishing.