Cave Diving Manual 2008

3th Edition (2008)

(1990) F.G.Balcombe, J.N.Cordingley, R.J.Palmer and R.A.Stevenson
(2008) David Brock, John Cordingley, Colin Hayward, Duncan Price, Rupert Skorupka, Rick Stanton,Mike Thomas, John Volanthen, Andrew Ward and Clive Westlake.