South Wales Caving Club - Ogof Ffynnon Ddu - Surveys
Ogof Ffynnon Ddu centerline survey using Survex's Aven.
With added sump and date info.
OFD SURVEX 3D IN AVEN
Some information from the Cambrian registry.
BLACK AND WHITE VERSION OF THE NEW OFD SURVEY
A PART OF THE NEW SURVEY IN COLOUR
The New colour survey of OFD, 780 * 3200 mm, is now on sale at SWCC.
Second Reprint with added extras
The price is £18.00.