References
(1975), , Caves of Northern Derbyshire. Part 4., p.22. Survey., Elliot, D.
(2010), , Caves of the Peak District, p. 80, DCA
(2016), A Typical Wednesday Night At Bullpit, TSG 19, pp. 137., Technical Speleological Group
(2016), Digging the back of Bull Pit, Descent 250, p.15., Wild Places Publishing
(2016), Latest on Bull Pit, Descent 252, p.15., Wild Places Publishing
(2016), The Bullpit Dig, TSG 19, pp. 130-136. Surveys, Technical Speleological Group
(2018), Bull Pit continues downwards, Descent 264, p.11., Wild Places Publishing
(2018), Bull Pit’s shaft, Descent 260, p.11., Wild Places Publishing
(2021), Bull Pit has a tricky restart, Descent 281, p.11, Wild Places Publishing
(2022), Bull Pit Dig, Descent 285, p. 7, Wild Places Publishing
(2023), Bull Pit, Descent 292, p.13., Stalactite Publishing
(2023), Bull Pit, we continue, Descent 294, Page 11., Stalactite Publishing
(2024), Bull Pit, Descent 299, P.13., Stalactite Publishing